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

Redeem

If \(x\) and \(y\) are positive integers and \(n=5^x+7^{y+15},\) what is the unit's digit of \(n?\)

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Legendary Member
Posts: 1622
Joined: Thu Mar 01, 2018 7:22 am
Followed by:2 members

If \(x\) and \(y\) are positive integers and \(n=5^x+7^{y+15},\) what is the unit's digit of \(n?\)

by Gmat_mission » Thu May 21, 2020 1:10 am

Timer

00:00

Your Answer

A

B

C

D

E

Global Stats

If \(x\) and \(y\) are positive integers and \(n=5^x+7^{y+15},\) what is the unit's digit of \(n?\)

(1) \(y=2x–15\)

(2) \(y^2–6y+5=0\)

[spoiler]OA=B[/spoiler]

Source: Manhattan GMAT
Top
Source: — Data Sufficiency |
Post new topic Post Reply
• Page 1 of 1