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Previous Year Paper

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CAT-2006-Previous Years Paper

Question
17 out of 25
 

The number of solutions of the equation 2x + y = 40 where both x and y are positive integers and xy is



A 7
B 13
C 14
D 18
E 20

Ans. B

– 2x + y = 40, xy.

Or, y = 40 – 2x

Values of x and y that satisfy the equation can be calculated like:

x

y

1

38

2

36

..

. ..

.

. ..

.

. ..

.

13 ..

14

These are 13 values.

CAT-2006-Previous Years Paper Flashcard List

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