i have a problem with a mikhail gorbachev trivia game, the number at the end where it tells you how many questions you got right is always wrong but i can't tell why. also how can i reset the radio buttons after each question

here is the code

#pragma once


namespace project {
	int question, ranswers, answers;



	using namespace System;
	using namespace System::ComponentModel;
	using namespace System::Collections;
	using namespace System::Windows::Forms;
	using namespace System::Data;
	using namespace System::Drawing;

	/// <summary>
	/// Summary for Form1
	///
	/// WARNING: If you change the name of this class, you will need to change the
	///          'Resource File Name' property for the managed resource compiler tool
	///          associated with all .resx files this class depends on.  Otherwise,
	///          the designers will not be able to interact properly with localized
	///          resources associated with this form.
	/// </summary>
	public ref class Form1 : public System::Windows::Forms::Form
	{
	public:
		Form1(void)
		{
			InitializeComponent();
			//
			//TODO: Add the constructor code here
			//
		}

	protected:
		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		~Form1()
		{
			if (components)
			{
				delete components;
			}
		}
	private: System::Windows::Forms::Button^  exit;
	protected: 
	private: System::Windows::Forms::RadioButton^  radioButton1;
	private: System::Windows::Forms::RadioButton^  radioButton2;
	private: System::Windows::Forms::RadioButton^  radioButton3;
	private: System::Windows::Forms::RadioButton^  radioButton4;
	private: System::Windows::Forms::Label^  label1;



	private: System::Windows::Forms::Button^  go;
	private: System::Windows::Forms::Label^  label2;

	private: System::ComponentModel::IContainer^  components;

	private:
		/// <summary>
		/// Required designer variable.
		/// </summary>


#pragma region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		void InitializeComponent(void)
		{
			this->exit = (gcnew System::Windows::Forms::Button());
			this->radioButton1 = (gcnew System::Windows::Forms::RadioButton());
			this->radioButton2 = (gcnew System::Windows::Forms::RadioButton());
			this->radioButton3 = (gcnew System::Windows::Forms::RadioButton());
			this->radioButton4 = (gcnew System::Windows::Forms::RadioButton());
			this->label1 = (gcnew System::Windows::Forms::Label());
			this->go = (gcnew System::Windows::Forms::Button());
			this->label2 = (gcnew System::Windows::Forms::Label());
			this->SuspendLayout();
			// 
			// exit
			// 
			this->exit->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 14.25F, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point, 
				static_cast<System::Byte>(0)));
			this->exit->Location = System::Drawing::Point(497, 399);
			this->exit->Name = L"exit";
			this->exit->Size = System::Drawing::Size(134, 41);
			this->exit->TabIndex = 0;
			this->exit->Text = L"Exit";
			this->exit->UseVisualStyleBackColor = true;
			this->exit->Click += gcnew System::EventHandler(this, &Form1::exit_Click);
			// 
			// radioButton1
			// 
			this->radioButton1->AutoSize = true;
			this->radioButton1->Location = System::Drawing::Point(88, 220);
			this->radioButton1->Name = L"radioButton1";
			this->radioButton1->Size = System::Drawing::Size(14, 13);
			this->radioButton1->TabIndex = 1;
			this->radioButton1->TabStop = true;
			this->radioButton1->UseVisualStyleBackColor = true;
			this->radioButton1->CheckedChanged += gcnew System::EventHandler(this, &Form1::radioButton1_CheckedChanged);
			// 
			// radioButton2
			// 
			this->radioButton2->AutoSize = true;
			this->radioButton2->Location = System::Drawing::Point(88, 270);
			this->radioButton2->Name = L"radioButton2";
			this->radioButton2->Size = System::Drawing::Size(28, 17);
			this->radioButton2->TabIndex = 2;
			this->radioButton2->TabStop = true;
			this->radioButton2->Text = L" ";
			this->radioButton2->UseVisualStyleBackColor = true;
			this->radioButton2->CheckedChanged += gcnew System::EventHandler(this, &Form1::radioButton2_CheckedChanged);
			// 
			// radioButton3
			// 
			this->radioButton3->AutoSize = true;
			this->radioButton3->Location = System::Drawing::Point(88, 320);
			this->radioButton3->Name = L"radioButton3";
			this->radioButton3->Size = System::Drawing::Size(14, 13);
			this->radioButton3->TabIndex = 3;
			this->radioButton3->TabStop = true;
			this->radioButton3->UseVisualStyleBackColor = true;
			this->radioButton3->CheckedChanged += gcnew System::EventHandler(this, &Form1::radioButton3_CheckedChanged);
			// 
			// radioButton4
			// 
			this->radioButton4->AutoSize = true;
			this->radioButton4->Location = System::Drawing::Point(88, 370);
			this->radioButton4->Name = L"radioButton4";
			this->radioButton4->Size = System::Drawing::Size(14, 13);
			this->radioButton4->TabIndex = 4;
			this->radioButton4->TabStop = true;
			this->radioButton4->UseVisualStyleBackColor = true;
			this->radioButton4->CheckedChanged += gcnew System::EventHandler(this, &Form1::radioButton4_CheckedChanged);
			// 
			// label1
			// 
			this->label1->AutoSize = true;
			this->label1->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 11.25F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, 
				static_cast<System::Byte>(0)));
			this->label1->Location = System::Drawing::Point(85, 57);
			this->label1->Name = L"label1";
			this->label1->Size = System::Drawing::Size(128, 18);
			this->label1->TabIndex = 5;
			this->label1->Text = L"Press Go to begin";
			this->label1->Click += gcnew System::EventHandler(this, &Form1::label1_Click);
			// 
			// go
			// 
			this->go->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 14.25F, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point, 
				static_cast<System::Byte>(0)));
			this->go->Location = System::Drawing::Point(264, 399);
			this->go->Name = L"go";
			this->go->Size = System::Drawing::Size(134, 41);
			this->go->TabIndex = 7;
			this->go->Text = L"Go";
			this->go->UseVisualStyleBackColor = true;
			this->go->Click += gcnew System::EventHandler(this, &Form1::go_Click);
			// 
			// label2
			// 
			this->label2->AutoSize = true;
			this->label2->Location = System::Drawing::Point(486, 119);
			this->label2->Name = L"label2";
			this->label2->Size = System::Drawing::Size(0, 13);
			this->label2->TabIndex = 8;
			this->label2->Click += gcnew System::EventHandler(this, &Form1::label2_Click);
			// 
			// Form1
			// 
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->ClientSize = System::Drawing::Size(643, 451);
			this->Controls->Add(this->label2);
			this->Controls->Add(this->label1);
			this->Controls->Add(this->go);
			this->Controls->Add(this->radioButton4);
			this->Controls->Add(this->radioButton3);
			this->Controls->Add(this->exit);
			this->Controls->Add(this->radioButton2);
			this->Controls->Add(this->radioButton1);
			this->Name = L"Form1";
			this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
			this->ResumeLayout(false);
			this->PerformLayout();

		}
#pragma endregion
	private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) {
			 }
private: System::Void label1_Click(System::Object^  sender, System::EventArgs^  e) {

		 }
private: System::Void radioButton1_CheckedChanged(System::Object^  sender, System::EventArgs^  e) {
		 }
private: System::Void radioButton2_CheckedChanged(System::Object^  sender, System::EventArgs^  e) {
		 }
private: System::Void radioButton3_CheckedChanged(System::Object^  sender, System::EventArgs^  e) {
		 }
private: System::Void radioButton4_CheckedChanged(System::Object^  sender, System::EventArgs^  e) {
		 }
private: System::Void File_Opening(System::Object^  sender, System::ComponentModel::CancelEventArgs^  e) {
		 }
private: System::Void exit_Click(System::Object^  sender, System::EventArgs^  e) {
			 this->Close();
		 }
		 
private: System::Void go_Click(System::Object^  sender, System::EventArgs^  e) {
			 answers = answers + 1;
			 
			 if(answers == 1){
			 this->label1->Text = "Mikhail Gorbachev was mostly known for being what?";
			 this->radioButton1->Text = "The Founder of friendly's";
			 this->radioButton2->Text = "The inventor of roomba";
			 this->radioButton3->Text = "The leader of the Soviet Union";
			 this->radioButton4->Text = "The inventor of the diesel engine";
			 			  this->label2->Text = "you got "+ ranswers +" right so far";
			 				if(radioButton3->Checked == true) {
					ranswers = ranswers + 1;
							}
			 }

		 
			 if(answers == 2){
			 this->label1->Text = "How did Mikhail Gorbachev win a Nobel Peace Prize?";
			 this->radioButton1->Text = "Ending Cold War tensions";
			 this->radioButton2->Text = "Freeing East Germany";
			 this->radioButton3->Text = "Freeing West Germany";
			 this->radioButton4->Text = "Reducing nuclear weapon stockpiles";// spelling
			 			  this->label2->Text = "you got "+ ranswers +" right so far";
			 				if(radioButton1->Checked == true) {
					ranswers = ranswers + 1;
							}
			 }
			 if(answers == 3){
			 this->label1->Text = "Who said this quote to him 'Mr. Gorbachev tear down that wall'?";
			 this->radioButton1->Text = "George W. Bush";
			 this->radioButton2->Text = "Ronald Reagan";
			 this->radioButton3->Text = "Barack Obama";
			 this->radioButton4->Text = "George H. Bush";// spelling
			 			  this->label2->Text = "you got "+ ranswers +" right so far";
			 				if(radioButton2->Checked == true) {
					ranswers = ranswers + 1;
							}
			 }
			 if(answers == 4){
			 this->label1->Text = "What was Mikhail's middle name?";
			 this->radioButton1->Text = "Illarionovich";
			 this->radioButton2->Text = "Vasil'evich";
			 this->radioButton3->Text = "Gorbachev";
			 this->radioButton4->Text = "Sergeyevich";
			 			  this->label2->Text = "you got "+ ranswers +" right so far";
			 				if(radioButton4->Checked == true) {
					ranswers = ranswers + 1;
							}
			 }
			 if(answers == 5){
			 this->label1->Text = "What was Mikhail's first job?";
			 this->radioButton1->Text = "Fast food worker";
			 this->radioButton2->Text = "Farmer";
			 this->radioButton3->Text = "Musician";//spelling
			 this->radioButton4->Text = "Coal miner";
			 			  this->label2->Text = "you got "+ ranswers +" right so far";
			 				if(radioButton2->Checked == true) {
					ranswers = ranswers + 1;
							}
			 }
			 if(answers == 6){
			 this->label1->Text = "When did Mikhail die?";
			 this->radioButton1->Text = "1990";
			 this->radioButton2->Text = "1910";
			 this->radioButton3->Text = "1930";//spelling
			 this->radioButton4->Text = "none of the above he is still alive";
			 			  this->label2->Text = "you got "+ ranswers +" right so far";
			 				if(radioButton4->Checked == true) {
					ranswers = ranswers + 1;
							}
			 }
			 if(answers == 7){
			 this->label1->Text = "What university did he go to?";
			 this->radioButton1->Text = "Moscow State University";
			 this->radioButton2->Text = "Yale";
			 this->radioButton3->Text = "Uconn";
			 this->radioButton4->Text = "Mendeleyev University of Chemical Technology";
			 			  this->label2->Text = "you got "+ ranswers +" right so far";
			 				if(radioButton1->Checked == true) {
					ranswers = ranswers + 1;
							}
			 }
			 if(answers == 8){
			 this->label1->Text = "When did he become the leader of the Soviet Union ?";
			 this->radioButton1->Text = "1990";
			 this->radioButton2->Text = "2003";
			 this->radioButton3->Text = "1560";
			 this->radioButton4->Text = "1991";
			 			  this->label2->Text = "you got "+ ranswers +" right so far";
			 				if(radioButton1->Checked == true) {
					ranswers = ranswers + 1;
							}
			 }
			 if(answers == 9){
			 this->label1->Text = "How long did he rule?";
			 this->radioButton1->Text = "9 year";
			 this->radioButton2->Text = "5 years";
			 this->radioButton3->Text = "6 years";
			 this->radioButton4->Text = "12 years";
			 			  this->label2->Text = "you got "+ ranswers +" right so far";
			 				if(radioButton3->Checked == true) {
					ranswers = ranswers + 1;
							}
			 }
			 if(answers == 10){
			 this->label1->Text = "Gorbachev appeared in a television ad for what company?";
			 this->radioButton1->Text = "McDonalds";
			 this->radioButton2->Text = "Taco Bell";
			 this->radioButton3->Text = "Pizza Hut";
			 this->radioButton4->Text = "Olive Garden";
			 			  this->label2->Text = "you got "+ ranswers +" right so far";
			 				if(radioButton3->Checked == true) {
					ranswers = ranswers + 1;
							}
			 }
			 if(answers == 11){
			 this->label1->Text = "What U.S. national disaster did mikhail visit?";
			 this->radioButton1->Text = "Hurricane Katrina";
			 this->radioButton2->Text = "Hurricane rita";
			 this->radioButton3->Text = "1993 Mississippi river flooding";
			 this->radioButton4->Text = "Chernobyl";
			 			  this->label2->Text = "you got "+ ranswers +" right so far";
			 				if(radioButton1->Checked == true) {
					ranswers = ranswers + 1;
							}
			 }
			 if(answers == 12){
			 this->label1->Text = "What is his religon?";
			 this->radioButton1->Text = "Muslim";
			 this->radioButton2->Text = "Jewish";
			 this->radioButton3->Text = "Catholic";
			 this->radioButton4->Text = "Atheist";//spelling
			 			  this->label2->Text = "you got "+ ranswers +" right so far";
			 				if(radioButton4->Checked == true) {
					ranswers = ranswers + 1;
							}
			 }
			 if(answers == 13){
			 this->label1->Text = "When was Mikhail Gorbachev born?";
			 this->radioButton1->Text = "1931";
			 this->radioButton2->Text = "1980";
			 this->radioButton3->Text = "1923";
			 this->radioButton4->Text = "1937";
			  this->label2->Text = "you got "+ ranswers +" right so far";
			 				if(radioButton1->Checked == true) {
					ranswers = ranswers + 1;
							}
			 }
			 if(answers == 14){
			 this->label1->Text = "When did Mikhail Gorbachev's wife die?";
			 this->radioButton1->Text = "1946";
			 this->radioButton2->Text = "1999";
			 this->radioButton3->Text = "1987";
			 this->radioButton4->Text = "1955";
			  this->label2->Text = "you got "+ ranswers +" right so far";
			 				if(radioButton2->Checked == true) {
					ranswers = ranswers + 1;
							}
			 }
			 if(answers == 15){
			 this->label1->Text = "What town was Mikhail Gorbachev born?";
			 this->radioButton1->Text = "Moscow";
			 this->radioButton2->Text = "Alagir";
			 this->radioButton3->Text = "Rostiv";
			 this->radioButton4->Text = "Privolnoye";
			  this->label2->Text = "you got "+ ranswers +" right so far";
			 				if(radioButton4->Checked == true) {
					ranswers = ranswers + 1;
							}
			 }
			 if(answers == 16){
			 this->label1->Text = "Why was the Gorbachev Foundation created?";
			 this->radioButton1->Text = "To provide shelter for the homeless";
			 this->radioButton2->Text = "Child abuse prevention";
			 this->radioButton3->Text = "For children with cancer";
			 this->radioButton4->Text = "To establish national standards for education";
			  this->label2->Text = "you got "+ ranswers +" right so far";
			 				if(radioButton3->Checked == true) {
					ranswers = ranswers + 1;
							}
			 }			 
			 if(answers == 17){
			 this->label1->Text = "Mikhail Gorbachev grew up under the leadership of which leader?";
			 this->radioButton1->Text = "Adolph Hitler";
			 this->radioButton2->Text = "Winston Churchill";
			 this->radioButton3->Text = "Benito Mussolini";
			 this->radioButton4->Text = "Joseph Stalin";
			  this->label2->Text = "you got "+ ranswers +" right so far";
			 				if(radioButton4->Checked == true) {
					ranswers = ranswers + 1; 
							}
			 }
			 if(answers == 18){
			 this->label1->Text = "What did Mikhail study in college?";
			 this->radioButton1->Text = "Law";
			 this->radioButton2->Text = "Medicine";
			 this->radioButton3->Text = "Music";
			 this->radioButton4->Text = "physics";
			  this->label2->Text = "you got "+ ranswers +" right so far";
			 				if(radioButton1->Checked == true) {
					ranswers = ranswers + 1;
							}
			 }
			 if(answers == 19){
			 this->label1->Text = "In addition to winning the Nobel Peace Prize what other honor(s) did he receive?";
			 this->radioButton1->Text = "Albert Einstein Award";
			 this->radioButton2->Text = "Martin Luther King Award";
			 this->radioButton3->Text = "Indira Gandhi Award";
			 this->radioButton4->Text = "All of the above";
			  this->label2->Text = "you got "+ ranswers +" right so far";
			 				if(radioButton4->Checked == true) {
					ranswers = ranswers + 1;
							}
			 }
			 if(answers == 20){
			 this->label1->Text = "What is Perestroika?";
			 this->radioButton1->Text = "A computer game";
			 this->radioButton2->Text = "A play ";
			 this->radioButton3->Text = "Restructuring of the Soviet economy";
			 this->radioButton4->Text = "A Russian card game";
			 this->label2->Text = "you got "+ ranswers +" right so far";
			 				if(radioButton3->Checked == true) {
					ranswers = ranswers + 1;

							}
			 }
			 if(answers == 21){
				 this->label1->Text = "Congratulations you got "+ ranswers +" out of 20";
			 }
		 }
				
				
				private: System::Void label2_Click(System::Object^  sender, System::EventArgs^  e) {
			;			 }
}
		 ;}

I see a few things that could be done to clean the code up.
The largest of which is that you have one HUGE method that seems to want to do all of the work. This is almost always a sign of a poor design.

The pseudo code for the 'on go click' should be something similar to the following:
first, evaluate the users answer to the displayed question (if any)
second setup the form for the next question or show final results.

You appear to be doing both, but you are displaying the question and immediatly evaluating the answer without giving the user a chance to interact with the form.

Regarding your question about how to reset the radio buttons, as you are setting the Text for each button

this->radioButton2->Text = "The inventor of roomba";

also set Checked = false

this->radioButton2->Text = "The inventor of roomba";
this->radioButton2->Checked = false;
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