Question

(h) 109864
g) 504042
6. Test the divisibility of the following numbers by 11:
(a) 2784
(b) 45353
(c) 23729
(d) 901351
(e) 5790322
(f) 8794232
(g) 111111
(h) 7138965
by 3. 7. In each of the following numbers.​

Answer 1

Answer:

we use positive and negative sign before each individual digit of number ,then if final sum is 0 or divisible by 11. in that case number will be divisible by 11.

if at unit digit of number ,there are 0,2,4,6,8 then this number will be divisible by 2.

if last two digit of number is divisible by 4,then number will be divisible by 4.

if individual sum of digits of a number is divisible by 3,then number will be divisible by 3.