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Looking for a mathematical formula
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Hi,
Lately I have been doing some numeracy tests in order to prepare myself for a test based interview as it seems to be the case with some of the firms hiring these days. Here is the question. I can not get my head around it. In fact I can get the answer doing it manually, but I think there a mathematical formula available to work this kind of problems out. Thanks a lot.
A town with a population of 2000 grows at a rate of 30% per annum. What will be its population in the next 4 years?
Lately I have been doing some numeracy tests in order to prepare myself for a test based interview as it seems to be the case with some of the firms hiring these days. Here is the question. I can not get my head around it. In fact I can get the answer doing it manually, but I think there a mathematical formula available to work this kind of problems out. Thanks a lot.
A town with a population of 2000 grows at a rate of 30% per annum. What will be its population in the next 4 years?
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Join Date: May 2006
Posts: 1,580
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With a growth rate of 30%, it'll be at 130% after each year. Since that compounds, you'll just have a simple formula of:
)
This assumes the compounding happens at one instant per year, rather than calculating continuously.
Plug that in, and you'll get 5712
This assumes the compounding happens at one instant per year, rather than calculating continuously.
Plug that in, and you'll get 5712
pop = 2000
Loop 4 times
pop = pop + (pop * 30%)
end loop The 3 Laws of the Procrastination Society:
1) Never do today that which can be put off until tomorrow
2) Tomorrow never comes
1) Never do today that which can be put off until tomorrow
2) Tomorrow never comes
Thanks a lot guys makes sense to me. But here I have got another question and the book has given its answer as 2 to the power of 5 meaning 32. Here is the question.
A culture of bacteria grows by a ratio of 1:2 every two hours. What will be the siez of the culture after 10 hours.
Sorry to bother you again, but this is something that has been bothering me day and night for quite some time now. Thanks....
A culture of bacteria grows by a ratio of 1:2 every two hours. What will be the siez of the culture after 10 hours.
Sorry to bother you again, but this is something that has been bothering me day and night for quite some time now. Thanks....
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Originally Posted by tech291083 
Thanks a lot guys makes sense to me. But here I have got another question and the book has given its answer as 2 to the power of 5 meaning 32. Here is the question.
A culture of bacteria grows by a ratio of 1:2 every two hours. What will be the siez of the culture after 10 hours.
Sorry to bother you again, but this is something that has been bothering me day and night for quite some time now. Thanks....
A currency loses its value by a factor of 0.02 a year. What % of its original value will be remaining after 5 years. Express you answer to the nearest full percentage.
Thanks...
These are all the same basic equation.
Calculate the first value from the original value.
Use that new value and calculate again.
Repeat the specified number of times.
Calculate the first value from the original value.
Use that new value and calculate again.
Repeat the specified number of times.
The 3 Laws of the Procrastination Society:
1) Never do today that which can be put off until tomorrow
2) Tomorrow never comes
1) Never do today that which can be put off until tomorrow
2) Tomorrow never comes
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Originally Posted by WaltP
These are all the same basic equation.
Calculate the first value from the original value.
Use that new value and calculate again.
Repeat the specified number of times.
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Join Date: Jan 2007
Posts: 3,210
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Solved Threads: 164
Kirk: "There must be thousands of them, tens of thousands..."
Spock: "One million, seven hundred seventy one thousand, five hundred and sixty one. That's assuming they got in here six days ago, and a litter of ten each day."
It's the same formula, in this case 11 ^ 6.
Spock: "One million, seven hundred seventy one thousand, five hundred and sixty one. That's assuming they got in here six days ago, and a litter of ten each day."
It's the same formula, in this case 11 ^ 6.
Daylight-saving time uses more gasoline
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