question: What will come in place of the x in the following Number series? 11, 14, 19, 22, 27, 30, 35, x
Options:
(A) 29
(B) 31
(C) 23
(D) 35
(E) 38
answer: Stream of consciousness: The pattern is + 3, + 5, + 3, + 5,
So the missing term is = 35 + 3 = 38. The answer is (E).
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question: What is the are of an equilateral triangle of side 10 cm?
Options:
(A) 663 cm2
(B) 253 cm2
(C) 643 cm2
(D) 645 cm2
(E) 143 cm2
answer: Stream of consciousness: Area of an equilateral triangle = 3/4 S2
If S = 10, Area of triangle = 3/4 * 10 * 10 = 253 cm2; The answer is (B).
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question: The average of seven numbers is 18. The average of first three numbers is 14 and the average of last three numbers is 23. What is the middle number?
Options:
(A) 25
(B) 27
(C) 15
(D) 32
(E) 34
answer: Stream of consciousness: The total of seven numbers = 7X18 = 126
The total of first 3 and last 3 numbers is = 3 X 14+3 X 23 = 111
So, the middle number is (126 - 111 ) = 15 The answer is (C).
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question: Find the number which when added to itself 13 times, gives 112.
Options:
(A) 7
(B) 8
(C) 9
(D) 10
(E) 11
answer:
Stream of consciousness: Let the number be x. Then, x + 13x = 112 14x = 112 x = 8. The answer is (B).
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