q: 80 is increased by 50%. Find the final number.
Options:
(A) 100
(B) 110
(C) 120
(D) 30
(E) 160
a: Stream of consciousness: Final number = Initial number + 50%(original number) = 80 + 50%(80) = 80 + 40 = 120. The answer is (C).

question: Every year an amount increases by 1/8th of itself. How much will it be after two years if its present value is Rs.64000?
Options:
(A) 81000
(B) 22887
(C) 26877
(D) 26771
(E) 17121
answer: Stream of consciousness: 64000* 9/8 * 9/8 = 81000 The answer is (A).

q: If a 3-digit integer is selected at random from the integers 700 through 899, inclusive, what is the probability that the second digit is one greater then the first digit, and the third digit is one greater than the second digit?
Options:
(A) 2/225
(B) 2/200
(C) 8/700
(D) 1/50
(E) 1/200
a: Stream of consciousness: Hundreds digit can be 7 or 8
If the hundreds digit is 7, then the tens digit has to be 8 and the units digit has to be 9
If the hundreds digit is 8, then the tens digit has to be 9 and the units digit has to be 10
A digit has to fall between 0 and 9, so 10 cannot be a digit
The number is 789
Total numbers between 700 and 899 = (899-700)+1 = 200
Probability = 1/200 The answer is (E).

question: There are 1000 doors that are of the open-close type. When a person opens the door he closes it and then opens the other. When the first person goes he opens-closes the doors in the multiples of 1 i.e., he opens and closes all the doors. when the second goes he opens and closes the doors 2, 4 6 8 respectively. Similarly when the third one goes he does this for 3 6 9 12 15th doors respectively. Find number of doors that are open at last.
Options:
(A) 29
(B) 31
(C) 32
(D) 24
(E) 21
answer: Stream of consciousness: 31. only the perfect squares between 1 to 1k The answer is (B).

q: An analyst will recommend a combination of 3 industrial stocks, 2 transportation stocks, and 2 utility stocks. If the analyst can choose from 4 industrial stocks, 5 transportation stocks, and 3 utility stocks, how many different combinations of 7 stocks are possible?
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Options:
(A) 12
(B) 19
(C) 60
(D) 180
(E) 720
a: Stream of consciousness: 4C3 * 5C2 * 3C2 = 4*60*3 = 720. The answer is (E).

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:
Stream of consciousness: 8597 ? = 7429 4358
? = 5526 The answer is (B).