Find the wrong number below mentioned series
11,150,280,560,800
Options:
(A) 800
(B) 560
(C) 280
(D) 150
(E) 11
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11 is the only prime number or odd number in the series. So the answer is: (E).
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A 180 meter long train crosses a man standing on the platform in 9 sec. What is the speed of the train?
Options:
(A) 72
(B) 108
(C) 1266
(D) 188
(E) 211
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S = 180/9 * 18/5 = 72 kmph So the answer is: (A).
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When N is divided by 10 the remainder is 1 and when N is divided by 3 the remainder is 2. What is the remainder G when N is divided by 30?
Options:
(A) (a) 4
(B) (b) 7
(C) (c) 11
(D) (d) 13
(E) (e) 17
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N ends in the digit 1 because when N is divided by 10, the remainder is 1. Since N ends in 1, the remainder G when N is divided by 30 also ends in a 1. 11 is the only choice which ends in a 1. So the answer is: (C).
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