1. What is the LCM of 56, 140 and 168 (2)
1) 1200
2) 840
3)1680
4) 64
5) None of these
2. Find the HCF of 720, 336 and 624 (3)
1) 62
2) 54
3) 48
4) 72
5) None of these
3. The LCM of two numbers is 28 times of their HCF. The sum of their LCM and HCF is 1740. If one of the numbers is 420, the other numbers is. (4)
1) 150
2) 225
3) 180
4) 240
5) None of these
4. Five bells toll together at the intervals of 5,6,8, 12 and 20 seconds respectively. Find the number of times they toll together in one hour’s time (inclusive of the toll at the beginning) (2)
1) 120
2) 31
3)30
4) 5
5) None of these
5. Find the greatest number, which will divided 1050,1250 and 1650 leaving the remainders 43,31 and 7 respectively.(1)
1) 53
2) 43
3) 63
4) 73
5) 49
6. A milk man has three different kinds of milk 493 liters, 551 liters and 435 liters. Find the minimum number of equal six containers required to store all the milk without mixing. (2)
1) 29
2) 51
3) 58
4)49
5) None
7. A trader has two varieties of rice 912 kg and 1330 kg. Find the number of minimum bags of equal size in which he can store the rice without mixing. (2)
1) 38
2) 59
3)35
4) 24
5) None of these
8. Find the least number which when increased by 4 is exactly divisible by 8, 16, 24, 30 and 32? (3)
1) 480
2) 484
3) 476
4) 472
5) None of these
9. What is the greatest number of five digits which when 3769 is added to it will be exactly divisible by 5, 6, 10, 12, 15 and 18? (4)
1) 4309
2) 99469
3) 100539
4) 99911
5) None of these
10. Find the minimum number of square tiles required to pave the floor of a room of 2m 50cm long and 1m 50cm broad. (4)
1) 50
2) 750
3) 45
4) 15
5) None of these