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

Redeem

One more..

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Senior | Next Rank: 100 Posts
Posts: 38
Joined: Mon Oct 08, 2007 9:58 pm
Thanked: 2 times

One more..

by aninditasivaram2406 » Mon Nov 12, 2007 4:55 pm
Hi,
Another one from the GMAT Prep...

If x4+y4=100, then the greatest possible value of x is between
a) 0 and 3
b) 3 and 6
c) 6 and 9
d) 9 and 12
e) 12 and 15
Answer – (b)

Thanks,
Anindita
Btw - x4 denotes x raised to the power of 4 and same for y4.
Top
Source: — Problem Solving |
Junior | Next Rank: 30 Posts
Posts: 12
Joined: Fri Aug 31, 2007 10:03 am
Thanked: 2 times

by showoff16884 » Mon Nov 12, 2007 5:22 pm
X is greatest when Y = 0.

X = 4th root of 100, which is between 3 & 6

(you know x has to be greater than 3, because when x=3, x^4 = 81 and x can't be greater than 6. You only have one option then)
Top
Post new topic Post Reply
• Page 1 of 1