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On January 1, Jamie did one sit-up. On each of the next 364 days
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08 May 2017, 06:19

1

3

00:00

A

B

C

D

E

Difficulty:

25% (medium)

Question Stats:

77% (01:36) correct 23% (01:51) wrong based on 190 sessions

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On January 1, Jamie did one sit-up. On each of the next 364 days, she did one more than on the previous day. What was the total number of sit-up she did in 365 days?

Re: On January 1, Jamie did one sit-up. On each of the next 364 days
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08 May 2017, 06:51

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Top Contributor

1

saswata4s wrote:

On January 1, Jamie did one sit-up. On each of the next 364 days, she did one more than on the previous day. What was the total number of sit-up she did in 365 days?

STOP! Before you calculate (365)(183), check the answer choice to see if you can avoid this tedious calculation. Examine the units digits of (365)(183)

Since 5 x 3 = 15, the units digit of (365)(183) will be 5

Only answer choice B meets this condition, so it must be the correct answer.

Re: On January 1, Jamie did one sit-up. On each of the next 364 days
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08 May 2017, 10:11

saswata4s wrote:

On January 1, Jamie did one sit-up. On each of the next 364 days, she did one more than on the previous day. What was the total number of sit-up she did in 365 days?

sum of N natural number = N(N+1)/2 So( 365 * 366 )/2 we will get 365 * 183 , no need to do multiplication also ...unit digit have to be 5..only option is B

On January 1, Jamie did one sit-up. On each of the next 364 days
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30 Jul 2018, 08:12

1

saswata4s wrote:

On January 1, Jamie did one sit-up. On each of the next 364 days, she did one more than on the previous day. What was the total number of sit-up she did in 365 days?

On January 1, Jamie did one sit-up. On each of the next 364 days
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30 Jul 2018, 08:37

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1

dave13 wrote:

saswata4s wrote:

On January 1, Jamie did one sit-up. On each of the next 364 days, she did one more than on the previous day. What was the total number of sit-up she did in 365 days?