Reasoning: Number = (35 * 12) = 420
Correct quotient = 420/21 = 20
Ans: (C)
Question: In a question on division with zero remainder, a candidate took 12 as divisor instead of 21. The quotient obtained by him was 35. The correct quotient is:
Options:
(A) 15
(B) 18
(C) 20
(D) 22
(E) 24

Rationale: The other parts are equal to 200.
The answer: (C)
Question: Four of the five parts numbered (a), (b), (c), (d) and (e) in the following equation are exactly equal. Which of the parts is not equal to the other four? The number of that part is the answer.
Options:
(A) 371.587 + 46.32 – 217.907
(B) 4 × 125 – 75 × 4
(C) 58.25 × 4.5 – 65.875
(D) 25 × 12 – 2 × 5 × 10
(E) 121 × 3.5 – 2 × 111.75

Reasoning: 70 + 60 = 130 * 5/18 = 325/9 mps
D = 150 + 100 = 250 m
T = 250 * 9/325 = 90/13 = 6 12/13 sec
Ans: (A)
Question: Two trains are moving at 60 kmph and 70 kmph in opposite directions. Their lengths are 150 m and 100 m respectively. The time they will take to pass each other completely is?
Options:
(A) 6 12/13 sec
(B) 7 1/7 sec
(C) 7 2/2 sec
(D) 8 1/2 sec
(E) 7 1/9 sec

Rationale: Formula = √a×b
A = 36 and B = 49
√36×49 = 6 × 7 = 42
The answer: (A)
Question: Find the mean proportional between 36 & 49?
Options:
(A) A) 42
(B) B) 61
(C) C) 63
(D) D) 65
(E) E) 67

Reasoning: Mentally imagine this number as (10 + 2 ) ×× 19 = 190 + 38 = 228.
Ans: (B)
Question: Find 12 ×× 19
Options:
(A) 238
(B) 228
(C) 208
(D) 277
(E) 101

Reasoning: 1/4: 1/2: 1/1 = 2:4:8
Ans: (A)

Question: The inverse ratio of 4: 2: 1 is?
Options:
(A) 2:4:8
(B) 2:3:9
(C) 2:3:2
(D) 2:3:6
(E) 2:3:1