A. 55

B. 150

C. 270

D. 275

E. 325

The OA is C

**Source: Magoosh**

00:00

**A**

**B**

**C**

**D**

**E**

Bob is training for a fitness competition. In order to increase his maximum number of pull-ups, he follows the following routine: he begins with 25 pull-ups, rests for thirty seconds, and then does 24 pull-ups and rests, dropping one pull-up each time (25, 24, 23, etc.) until his final set of 11 pull-ups. How many total pull-ups does Bob do?

A. 55

B. 150

C. 270

D. 275

E. 325

The OA is C

** Source: Magoosh**

A. 55

B. 150

C. 270

D. 275

E. 325

The OA is C

- GMATGuruNY
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The pull-up totals = the integers between 11 and 25, inclusive.swerve wrote: ↑Mon Aug 24, 2020 10:52 amBob is training for a fitness competition. In order to increase his maximum number of pull-ups, he follows the following routine: he begins with 25 pull-ups, rests for thirty seconds, and then does 24 pull-ups and rests, dropping one pull-up each time (25, 24, 23, etc.) until his final set of 11 pull-ups. How many total pull-ups does Bob do?

A. 55

B. 150

C. 270

D. 275

E. 325

For any set of consecutive integers:

Count = biggest - smallest + 1

Average = (biggest + smallest)/2

Sum = (count)(average)

In the set above:

Count = 25 - 11 + 1 = 15

Average = (25 + 11)/2 = 18

Sum = (15)(18) = 270

The correct answer is C.

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Followed here and elsewhere by over 1900 test-takers.

I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.

My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.

As a tutor, I don't simply teach you how I would approach problems.

I unlock the best way for YOU to solve problems.

For more information, please email me (Mitch Hunt) at [email protected].

Student Review #1

Student Review #2

Student Review #3