question: A sells a Cricket Bat to B at a profit of 20%. B sells it to C at a profit of 25%. If C pays $231 for it, the cost price of the Cricket Bat for A is:
Options:
(A) 150
(B) 120
(C) 154
(D) 160
(E) 210
answer: Stream of consciousness: 125% of 120% of A = 231
125/100 * 120/100 * A = 231
A = 231 * 2/3 = 154. The answer is (C).
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question: There are 3 teams each with 7 basket players. How many combinations are there if we were to pick 2 players from the 3 teams such that no team was picked twice?
Options:
(A) 50
(B) 23
(C) 147
(D) 28
(E) 45
answer: Stream of consciousness: There are altogether three arrangements, which are we can select two members each from team A and B, each from team A and C, and each from team B and C. For each arrangement, there are altogether 49 possibilities (7*7) since each team has 7 players. So there are a total of 147 possibilities (49*3). I hope this method is easier for you to understand. The answer is (C).
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question: 5,9,20,32,52,__
Options:
(A) 79
(B) 85
(C) 81
(D) 82
(E) 83
answer: Stream of consciousness: (9+5) +6 = 20
(16+9) +7 = 32
(28+16)+8 = 52
(48+28)+9 = 85 The answer is (B).
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question: Every Sunday, Giri jogs 3 miles. For the rest of the week, each day he jogs 1 mile more than the previous day. How many miles does giri jog in 2 weeks ?
Options:
(A) 42
(B) 63
(C) 84
(D) 98
(E) 108
answer:
Stream of consciousness: In one week, Giri jogs 3 + 4 + 5 + 6 + 7 + 8 + 9 = 42 miles
In two weeks, Giri jogs 84 miles. The answer is (C).
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