Question

1. Write all the common factors of:
(1) 19, 12 (i) 18,30 (i) 27,63 (iv) 15,45 (v) 12, 15, 27
(vi) 20, 45, 60 (vm) 24, 32, 40 (vii) 18, 54, 27.
2. Find the HCF of the following numbers by both prime factorization method and
Euclid's algorithm.
(1) 117, 81 () 84, 98 (1) 170, 238 (iv) 1320, 935 (v) 1261, 442
(vi) 70, 35, 49 (vi) 12, 45, 75 (vi) 70, 105, 175 (ix) 91, 112, 49
3. What is the HCF of any two consecutive numbers?​

Answer 1

Answer:

1

1- 1

2- 1,2,3,6,

3- 1,2,3,9,

4-1,3,5,15

5-1,3

6-1,5,

7-1,2,4,8,

8-1,3,9

Answer 2

Answer:

1.

1.1

2. 1,2,3,6

3.1,2,3,9

4. 1,3,5,15

5. 1,3

6. 1,5

7. 1,2,4,8

8. 1,3,9