Question

Q1. The smallest prime number*

1 point

5

4

3

2

Q2. Factors of 15 are *

1 point

2 , 4 ,6 ,3

1, 3, 5, 15

4, 6, 8, 9

7, 5, 3, 2

Q3. A number divisible by 5 if it has *

1 point

0 or 5 in its ones place

1 and 2 in its ones place

2 and 3 in its ones place

4 and 6 in its ones place

Q4. The number which is divisible by 9 *

1 point

436

749

888

891

Q5. Prime factorisation of 210 *

1 point

2 x 3 x 5 x 7

3 x 5 x 4 x 2

3 x 4 x 2 x 2

5 x 3 x 2 x 3

Q6. The L.C.M. of 12 ,15 and 20*

1 point

2 x 3 x 3 x 5

3 x 5 x 4 x 2

3 x 4 x 2 x 6

2 x 2 x 3 x 5

Q7. H.C.F. of 12 and 18 *

1 point

4

3

6

9

Q8. Find the greatest number which divides 18 and 24 exactly.*

1 point

6

8

7

2

Q9. A shopkeeper sold mathematics books for Rs. 40 on Monday and for Rs. 76 on Tuesday. What can be the maximum price of each book? *

1 point

9

5

4

12

Q10. Find the least numer which is exactly divisible by 12, 18 and 24. *

1 point

72

56

42

86

​

Answer 1

1. 2
2. 21,3,5,15
3. 21,3,5,150 or 5
4. 21,3,5,150 or 5891
5. 21,3,5,150 or 58912 x 3 x 5x7
6. 2 x 2 x 3 x 5
7. 6
8. 2
9. 4
10. 72

Answer 2

Answer:

१) 2

२) 1,3 ,5,15

3) 0 or 5 on unit place

4) 749

5) 2×3×5×7

6) 2×2×3×5

7) 4

8) 6

9) this is not understand because how many are there

10) 72