RRB NTPC SAMPLE PAPER - ARITHMETIC - 136

1. By which smallest number 1323 must be multiplied, so that it becomes a perfect cube?

(a) 2
(b) 3
(c) 5
(d) 7

2. The least number, which when divided by 12, 15, 20 or 54 leaves a remainder of 4 in each case, is :

(a) 450
(b) 454
(c) 540
(d) 544

3. The numbers x and y (x > y) are such that their sum is equal to three times their difference. Then value of 3xy/2(x²-y²) will be:

(a) 2/3
(b) 1
(c) 3/2
(d) 5/3

4. A man spends 1/4^th of his income on food 2/3^rd of it on house, rent and the remaining which is Rs. 630 on other commodities. Find his house rent ?

(a) Rs. 5040
(b) Rs. 3520
(c) Rs. 4890
(d) Rs. 4458

5. A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is that number?

(a) 6
(b) 3.5
(c) 8
(d) None of these

Railway Recruitment Board (RRB) NTPC Exams Study Kit

Answer:

1. (d) 2. (c) 3. (b) 4. (a) 5. (c)