Saturday, March 10, 2007

"ALGEBRA QUESTION OF THE DAY"

If n is an integer, which of the following CANNOT be an even integer?
(A) 2n + 2
(B) n – 5
(C) 2n
(D) 2n + 3
(E) 5n + 2
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5 comments:

goyalakshay said...

d

March 10, 2007 at 10:06 AM
sachi said...

ans- d

March 10, 2007 at 10:36 AM
Unknown said...

what abt N-1

March 11, 2007 at 12:28 AM
Bharat A said...

its D

March 11, 2007 at 5:50 AM
Admin said...

Choose n to be 1. Then 2n + 2 = 2(1) + 2 = 4, which is even. So eliminate (A). Next, n – 5 = 1 – 5 = –4.
Eliminate (B). Next, 2n = 2(1) = 2. Eliminate (C). Next, 2n + 3 = 2(1) + 3 = 5 is not even—it may be our
answer. However, 5n + 2 = 5(1) + 2 = 7 is not even as well. So we choose another number, say, 2. Then
5n + 2 = 5(2) + 2 = 12 is even, which eliminates (E). Thus, choice (D), 2n + 3, is the answer.

SO U ALL R CORRECT

March 14, 2007 at 11:41 AM

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