Mathematics Quiz For RRB NTPC : 31st January 2020 For HCF

Q1. The HCF and LCM of 2 numbers are 44 and 264 respectively if the first number is divided by 2, the quotient is 44. The other no is. ?
(a) 147
(b) 528
(c) 132
(d) 264

Q2. The least number which when divided by 4, 6, 8, 12 and 16 leaves a remainder 2 in each case ?
(a) 46
(b) 48
(c) 50
(d) 56

Q3. Find the greatest number of 5 digits which when divided by 3, 5, 8, 12 have 2 as remainder ?
(a) 99999
(b) 99958
(c) 99960
(d) 99962

Q4. A, B, C start running at the same time and at the same point in the same direction in a circular stadium. A completes round is 252 sec, B in 308 sec & C in 198 seconds. After what time will they meet again at the starting point ?
(a) 26 minutes 18 sec
(b) 42 m 36 sec
(c) 45 m
(d) 46 m 12 sec

Q5. Find the largest number of 4 digits such that on dividing by 15, 18, 21 and 24 the remainders are 11, 14, 17 and 20 respectively ?
(a) 6557
(b) 7556
(c) 5675
(d) 7664

Q6. Which is the least number which when doubled will be exactly divisible by 12, 18, 21 and 30 ?
(a) 2520
(b) 1260
(c) 630
(d) 196

Q7. If the students of a class can be grouped exactly into 6 or 8 or 10, then the minimum number of students in the class must be ?
(a) 60
(b) 120
(c) 180
(d) 240

Q8. A number which when divided by 10 leaves remainder 9, when divided by 9 leaves a remainder of 8, and when divided by 8 leaves a remainder of 7 is ?
(a) 1539
(b) 539
(c) 359
(d) 1359

Q9. What least no. must be subtracted from 1936 so that the resulting number when divided by 9, 10 and 15 will leave in each case the same remainder 7 ?
(a) 37
(b) 36
(c) 39
(d) 30

Q10. Three bells ring simultaneously at 11 am. They ring at regular interval of 20 minutes, 30 min and 40 min respectively. The time when all three ring together next is ?
(a) 2 pm
(b) 1 pm
(c) 1.15 pm
(d) 1.30 pm

Solutions:

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