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1. If x and y are unequal positive integers and √xy > 5, which of the following cannot be the value of (x + y) ?

(a) 16
(b) 10
(c) 20
(d) 25

2. If a = bc and (a + b)2 = c2 where a, b, c are all positive, which of the following is true?

A. b > 1
B. b = 1
C. b < 1
D. can’t determine

3. 2 | x | + 4y = 8; 6 | y | – 2x = 18; which of the following values of (x, y) satisfy both these equations?

A. (1, – 6)
B. (– 6, – 1)
C. (– 2, 1)
D. (– 2, – 1)

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Attached Files

Number System Questions for practice for CAT.pdf (277.7 KB, 1439 views)