1. The least number of five digits which is exactly divisible by 12, 15 and 18 is:
a. 10080
b. 15847
c. 10584
d. 10080
Answer: c
2. The largest number which divides 25, 73 and 97 to leave the same remainder in each case is:
a. 20
b. 22
c. 23
d. 24
Answer: d
3. The H.C.F of two numbers is 11 and their L.C.M us 7700. If one of these numbers is 275, then the other one is:
a. 457
b. 356
c. 279
d. 447
Answer: c
4. What is the least number which when divided by 8,9,12 and 15 leaves the same remainder 1 in each case?
a. 361
b. 457
c. 354
d. None of these
Answer: a
5. Two numbers are in the ratio of 15:11. If their H.C.F. is 13., then the numbers are:
a. 457, 56
b. 195, 143
c. 156, 143
d. 143,195
Answer: b