q: Find the odd man out
1, 3, 7, 11, 15, 18, 21
Options:
(A) 3
(B) 7
(C) 18
(D) 21
(E) 1
a: The 18 is the only even number in the series. The answer is (C).
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q: How much more would Rs.20000 fetch, after two years, if it is put at 20% p.a. compound interest payable half yearly than if is put at 20% p.a. compound interest payable yearly?
Options:
(A) 482
(B) 887
(C) 299
(D) 277
(E) 200
a: 20000(11/10)4 - 20000(6/5)2 = 482 The answer is (A).
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q: The squared value of the diagonal of a rectangle is (64 + B2) sq cm, where B is less than 8 cm. What is the breadth of that rectangle?
Options:
(A) 6 cm
(B) 10 cm
(C) 8 cm
(D) Data inadequate
(E) None of these
a: Diagonal2 = 64 + B2 or, 10(2) = 64 + 6(2) The answer is (A).
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q: In a certain animal population, for each of the first 3 months of life, the probability that an animal will die during that month is 1/10. For a group of 600 newborn members of the population, approximately how many would be expected to survive the first 3 months of life?
Options:
(A) 438
(B) 446
(C) 452
(D) 462
(E) 470
a:
Number of newborns that can die in first month = 1/10 *600 = 60
Survived = 540
Number of newborns that can die in second month = 1/10 * 540 = 54
Survived = 486
Number of newborns that can die in third month = 1/10 * 486 = 48
Survived = 438 The answer is (A).
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