1. Two pipes of length 1.5 m and 1.2 m are to be cut into equal pieces without leaving any extra length of pipes. The greatest length of the pipe pieces of same size which can be cut from these two lengths will be ?

0.13 metre

0.4 metre

0.3 metre

0.41 metre

Answer: 0.3 metre

Explanation:


2. In a school, 391 boys and 323 girls have been divided into the largest possible equal classes, so that each class of boys numbers the same as each class of girls. What is the number of classes ?

23

19

44

17

Answer: 17

Explanation:


3. 84 Maths books, 90 Physics books and 120 Chemistry books have to be stacked topic wise. How many books will be there in each stack so that each stack will have the same height too ?

12

18

6

21

Answer: 6

Explanation:


4. Three sets of English, Mathematics and Science books containing 336, 240, 96 books respectively have to be stacked in such a way that all the books are stored subject-wise and the height of each stack is the same. Total number of stacks will be ?

14

21

22

48

Answer: 14

Explanation:


5. A milk vendor has 21 litres of cow milk, 42 litres of toned milk and 63 litres of double toned milk. If he wants to pack them in cans so that each can contains same litres of milk and does not want to mix any two kinds of milk in a can, then the least number of cans required is ?

3

6

9

12

Answer: 6

Explanation:


6. The product of two 2–digit numbers is 2160 and their H.C.F. is 12. The numbers are ?

(12, 60)

(72, 30)

(36, 60)

(60, 72)

Answer: (36, 60)

Explanation:


7. Two numbers are in the ratio 3 : 4. If their LCM is 240, the smaller of the two number is ?

100

80

60

50

Answer: 60

Explanation:


8. Two numbers are in the ratio 3 : 4. Their L.C.M. is 84. The greater number is ?

21

24

28

84

Answer: 28

Explanation:


9. Two numbers are in the ratio 3 : 4. If their HCF is 4, then their LCM is ?

48

42

36

24

Answer: 48

Explanation:


10. The ratio of the sum to the LCM of two natural numbers is 7 : 12. If their HCF is 4, then the smaller number is ?

20

16

12

8

Answer: 12

Explanation: