question: How many positive integers less than 500 can be formed using the numbers 1,2,3,and 5 for digits, each digit being used only once.
Options:
(A) 34
(B) 677
(C) 197
(D) 177
(E) 191
answer: Stream of consciousness: Single digit numbers = 4
Double digit numbers = 4 x 3 = 12
Three digit numbers = 3 x 3 x 2 x 1 = 18
Total = 34 The answer is (A).

q: The sale price sarees listed for Rs.400 after successive discount is 10% and 5% is?
Options:
(A) 349
(B) 349
(C) 342
(D) 346
(E) 344
a: Stream of consciousness: 400*(90/100)*(95/100) = 342 The answer is (C).

question: Find the largest 4 digit number which isexactly divisible by 88?
Options:
(A) 2413
(B) 4356
(C) 9944
(D) 7939
(E) 4674
answer: Stream of consciousness: Largest 4 digit number is 9999
After doing 9999 88 we get remainder 55
Hence largest 4 digit number exactly divisible by 88 = 9999 - 55 = 9944 The answer is (C).

q: Which of the following numbers is divisible by 12?
Options:
(A) 1332
(B) 1021
(C) 3221
(D) 4211
(E) 3233
a: Stream of consciousness: 1332. This is the only option with last two digits divisible by 12 The answer is (A).

question: The average of first 17 even numbers is?
Options:
(A) 10
(B) 11
(C) 18
(D) 20
(E) 24
answer: Stream of consciousness: Sum of 17 even numbers = 17 * 18 = 306
Average = 306/17 = 18 The answer is (C).

question: A train 490 m long, running with a speed of 63 km/hr will pass a tree in?
Options:
(A) 15 sec
(B) 16 sec
(C) 28 sec
(D) 20 sec
(E) 25 sec
answer:
Stream of consciousness: Speed = 63 * 5/18 = 35/2 m/sec
Time taken = 490 * 2/35 = 28 se The answer is (C).