1. The least number which when divided by 5, 6, 7 and 8 leaves a remainder 3, but when divided by 9 leaves no remainder is ?

1677

1683

2523

3363

Answer: 1683

Explanation:


2. What is the smallest number which leaves remainder 3 when divided by any of the numbers 5, 6 or 8 but leaves no remainder when it is divided by 9 ?

123

603

723

243

Answer: 243

Explanation:


3. The least perfect square, which is divisible by each of 21, 36 and 66 is ?

214344

214434

213444

231444

Answer: 213444

Explanation:


4. The least number, which when divided by 4, 5 and 6 leaves remainder 1, 2 and 3 respectively, is ?

57

59

61

63

Answer: 57

Explanation:


5. The H.C.F. of two numbers is 8. Which one of the following can never be their L.C.M. ?

24

48

56

60

Answer: 60

Explanation:


6. The LCM of two numbers is 520 and their HCF is 4. If one of the number is 52, then the other number is ?

40

42

50

52

Answer: 40

Explanation:


7. The HCF and product of two numbers are 15 and 6300 respectively. The number of possible pairs of the numbers is ?

4

3

2

1

Answer: 2

Explanation:


8. The product of two numbers is 1280 and their H.C.F. is 8. The L.C.M. of the number will be ?

160

150

120

140

Answer: 160

Explanation:


9. The product of two numbers is 4107. If the H.C.F. of the numbers is 37, the greater number is ?

185

111

107

101

Answer: 111

Explanation:


10. The LCM of two numbers is 1920 and their HCF is 16. If one of the number is 128, find the other number ?

204

240

260

320

Answer: 240

Explanation: