For any numbers w and z, w#z = w^3z(8 - w^2). If both z and w#z are positive numbers, which of the following could be a value of w?
Options:
(A) 9
(B) 3
(C) 0
(D) −2
(E) −9
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Since w#Z and w are positive, we need to take the value of w such that w#z or w^3z(8 - w^2) is positiv So the answer is: (E).
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A train 250 m long, running with a speed of 50 km/hr will pass a tree in?
Options:
(A) 18sec
(B) 20sec
(C) 25sec
(D) 30sec
(E) 1min
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Speed = 50 * 5/18 = 125/9 m/sec
Time taken = 250 *9/125 = 18 sec So the answer is: (A).
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What should come in the place of the question mark(?) in the following equation?
69012 – 20167 + (51246 ÷ 6) = ?
Options:
(A) 57385
(B) 57286
(C) 57476
(D) 57368
(E) None of these
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? = 48845 + 51246⁄6 = 48845 + 8541 = 57386 So the answer is: (E).
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