Question

1. find the HCF of 20,28,36
2. use number line and add the following integer: ( - 5 ) + ( 10 )

3.add the number 234 , 197 and 103 using suitable property

4. find the common factors of 15 and 25 .

Answer 1

Answer:

(a) The common factor of 20, 28 and 36 is 2(occurring twice). Thus, HCF of 20, 28 and 36 is 2 × 2 = 4.

(b)

Answer 2

ANSWER↓

1. 36 = 2 × 2 × 3 × 3; The common factor of 20, 28 and 36 is 2(occurring twice). Thus, HCF of 20, 28 and 36 is 2 × 2 = 4.
2. (-5) + (10) => -5
3. 234 + 197 + 103 = 234 + (197 + 103)= 234 + 300 = 534
4. The Greatest Common Factor of 15and25 is 5.