Question

EXERCISE - 3.1
1.
Which of the following numbers are divisible by 2, by 3 and by 6?
(i) 321729 (ii) 197232 (iii) 972132 (iv) 1790184
(v) 312792 (vi) 800552 (vii) 4335 (viii) 726352​

Answer 1

Answer:

• divisible of 2:if the last digit is 2,4,6,8 or 0 it is divisible by 2.
• divisible of 3:firstly add the all digits of the number,if the sum is divisible by 3,then the number is divisible by 3.
• divisible of 6:if the number is divisible by both 2 and 3 then,it is divisible by 6.

answer=(i)no,it is not divisible by 2 and 6.it is only divisible by 3.

(ii)yes,it is divisible by 2,3 and 6.

(iii)yes,it is divisible by 2,3 and 6.

(iv)yes,it is divisible by 2,3 and 6.

(v)yes,it is divisible by 2,3 and 6.

(vi)no,it is not divisible by 3 and 6.it is only divisible by 2.

(vii)no,it is not divisible by 2 and 6.it is only divisible by 3.

(viii)no,it is not divisible by 3 and 6.it is only divisible by 2.