The "superprime" of a number is defined as the sum

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AAPL: Moderator; Posts: 2648; Joined: Sun Oct 29, 2017 2:08 pmFollowed by: 2 members

by AAPL » Wed Jul 24, 2019 5:43 am

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Princeton Review

The "superprime" of a number is defined as the sum of its distinct prime factors. What is the "superprime" of 40?

A. 7
B. 8
C. 11
D. 13
E. 22

OA A

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Source: Beat The GMAT — Problem Solving | Wed Jul 24, 2019 5:43 am

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Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members; Location: Vancouver, BC; Thanked: 5254 times; GMAT Score:770

by Brent@GMATPrepNow » Wed Jul 24, 2019 6:19 am

AAPL wrote:Princeton Review

The "superprime" of a number is defined as the sum of its distinct prime factors. What is the "superprime" of 40?

A. 7
B. 8
C. 11
D. 13
E. 22

OA A

40 = (2)(2)(2)(5)
So, the sum of the DISTINCT prime factors = 2 + 5 = 7

Answer: A

Cheers,
Brent

Brent Hanneson - Creator of GMATPrepNow.com

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Scott@TargetTestPrep: GMAT Instructor; Posts: 8157; Joined: Sat Apr 25, 2015 10:56 amFollowed by: 29 members; Location: Los Angeles, CA; Thanked: 43 times

by Scott@TargetTestPrep » Wed Jul 31, 2019 4:24 pm

AAPL wrote:Princeton Review

The "superprime" of a number is defined as the sum of its distinct prime factors. What is the "superprime" of 40?

A. 7
B. 8
C. 11
D. 13
E. 22

OA A

Since the distinct prime factors of 40 are 5 and 2, then the "superprime" of 40 is 5 + 2 = 7.

Answer: A

Scott Woodbury-Stewart
Founder and CEO
[email protected]

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