question: What should come in place of the question mark (?) in the following equation?
12400 + 6899 = 610+ ?
Options:
(A) 12345
(B) 56894
(C) 18689
(D) 23478
(E) 94561
answer: Stream of consciousness: 12400 + 6899 = 610+ ?
12400 + 6899 610 = 18689 The answer is (C).

q: Rs. 5000 is divided into three parts A, B and C. How much A is more than C if their ratio is 1/5:1/5:1/10?
Options:
(A) 1000
(B) 992
(C) 772
(D) 552
(E) 312
a: Stream of consciousness: 1/5:1/5:1/10 = 2:2:1
1/5*5000 = 1000
2000-1000 = 1000 The answer is (A).

question: 16,25,36,72,144,196,225
Options:
(A) 36
(B) 196
(C) 225
(D) 144
(E) 72
answer: Stream of consciousness: Each of the numbers except 72 is a perfect squar The answer is (E).

q: If the cost price of 50 articles is equal to the selling price of 25 articles, then the gain or loss percent is?
Options:
(A) 16
(B) 127
(C) 12
(D) 18
(E) 100
a: Stream of consciousness: Percentage of profit = 25/25 * 100 = 100% The answer is (E).

question: Three 6 faced dice are thrown together. The probability that exactly two dice show the same number on them is
Options:
(A) 5/9
(B) 5/12
(C) 1/36
(D) 7/12
(E) 4/9
answer: Stream of consciousness: Using question number 11 and 12, we get the probability as
1 - (1/36 + 5/9) = 5/12 The answer is (B).

question: In 1 kg mixture of sand and iron, 20% is iron. How much sand should be added so that the proportion of iron becomes 10%?
Options:
(A) 1 kg
(B) 200 gms
(C) 800 gms
(D) 1.8 kg
(E) None of these
answer:
Stream of consciousness: In 1 kg mixture quantity of iron = 200 gm
Let x gm sand should be added, then
10% of (1000 + x) = 200
\ x = 1000 gm = 1 kg The answer is (A).