BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

If the tens digit of positive integers x, y are 6, how many

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Elite Legendary Member
Posts: 3991
Joined: Fri Jul 24, 2015 2:28 am
Location: Las Vegas, USA
Thanked: 19 times
Followed by:37 members

If the tens digit of positive integers x, y are 6, how many

by Max@Math Revolution » Mon Mar 14, 2016 5:08 pm
If the tens digit of positive integers x, y are 6, how many values of the tens digit of 2(x+y) can be there?

A. 2
B. 3
C. 4
D. 5
E. 6


* A solution will be posted in two days.
Top
Source: — Problem Solving |
User avatar
Elite Legendary Member
Posts: 3991
Joined: Fri Jul 24, 2015 2:28 am
Location: Las Vegas, USA
Thanked: 19 times
Followed by:37 members

by Max@Math Revolution » Thu Mar 17, 2016 5:21 pm
If the tens digit of positive integers x, y are 6, how many values of the tens digit of 2(x+y) can be there?

A. 2
B. 3
C. 4
D. 5
E. 6


-> If X=y=60, 2(x+y)=240 is derived. If x=y=69, 2(x+y)=276 is derived, which makes 4,5,6,7 possible for the tens digit. Therefore, the answer is C.
Top
Post new topic Post Reply
• Page 1 of 1