q: What should come in place of question mark(?) in the following equation?
8597 – ? = 7429 – 4358
Options:
(A) 5706
(B) 5526
(C) 5426
(D) 5626
(E) None of these
a: 8597 – ? = 7429 – 4358
∴ ? = 5526 The answer is (B).
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q: A money lender lends Rs.2000 for six months at 20% p.a. rate. It the interest is reckoned quarterly than find the amount given after time limit?
Options:
(A) 2205
(B) 2888
(C) 2669
(D) 2770
(E) 2771
a: A = 2000(21/20)2 = 2205 The answer is (A).
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q: 80 white and black tiles will be used to form a 10x10 square pattern. If there must be at least one black tile in every row and at least one white tile in every column, what is the maximum difference between the number of black and white tiles that can be used?
Options:
(A) 75
(B) 80
(C) 85
(D) 90
(E) 60
a: Answer = E
Please refer diagram below
70 - 10 = 60 The answer is (E).
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q: A boat moves upstream at the rate of 1 km in 20 minutes and down stream 1 km in 12 minutes. Then the speed of the current is :
Options:
(A) 1 kmph
(B) 2 kmph
(C) 3 kmph
(D) 2.5 kmph
(E) 3.5 kmph
a:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Rate upstream = (1/20 *60) = 3 kmph
Rate dowm stream = 1/12 * 60 = 5 kmph
Rate of the current = ½ (5-3) = 1 kmph The answer is (A).
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