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A computer can perform 1,000,000 calculations per second. At

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by SampathKp » Sun Dec 29, 2019 7:54 pm
BTGmoderatorDC wrote:A computer can perform 1,000,000 calculations per second. At this rate, how many hours will it take this computer to perform the 3.6*10^11 calculations required to solve a certain problem?

A. 60
B. 100
C. 600
D. 1,000
E. 6,000




OA B

Source: Official Guide
Given that in 1 sec a computer can perform 10^6 calculations

so in hour (3600 seconds) a computer can perform 3600 * 10^6 which is 3.6* 10^9 (Converting it into form the question is asked)

So to perform 3.6*10^11 calculations, a computer will need 100 hours.

Answer is B
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by swerve » Mon Dec 30, 2019 11:37 am
BTGmoderatorDC wrote:A computer can perform 1,000,000 calculations per second. At this rate, how many hours will it take this computer to perform the 3.6*10^11 calculations required to solve a certain problem?

A. 60
B. 100
C. 600
D. 1,000
E. 6,000




OA B

Source: Official Guide
1 million (6 zeros) per second.

We need to perform 3.6*(10^11). Which is 36*10^10. Let's take out the million (6 zeros so we are left with 4 zeros) 36,0000 Million.

We need the number of hours so let's divide by 3600. (60minutes*60seconds)

360000/3600=100
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by Scott@TargetTestPrep » Sun Jan 05, 2020 8:04 pm
BTGmoderatorDC wrote:A computer can perform 1,000,000 calculations per second. At this rate, how many hours will it take this computer to perform the 3.6*10^11 calculations required to solve a certain problem?

A. 60
B. 100
C. 600
D. 1,000
E. 6,000

OA B

Source: Official Guide
We note that 1,000,000 = 10^6. Thus, the number of seconds it takes to perform 3.6*10^11 calculations is:

(3.6*10^11 / 10^6) = 3.6 x 10^5

Since 1 hour = 3600 seconds, the number of hours is:

3.6 x 10^5 / 3.6 x 10^3 = = 10^2 = 100

Answer: B

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