Question

How can a 5th class student would know that 589:651 will be canceled with 31 table. Is there an easiest solution to solve it?

Answer 1

Answer:

as it is not even it is not a multiple of 2

5+8+9=22 22 is not divisible by 3 so the no. is also not divisible by 3

the last 2 digit of 589 is 89 and 89 is not divisible by 4 so the no is also not divisible by 4

in the number the end of digit is neither 5 nor 0 so it will not be divisible by 5

as the no 589 is not divisible by 2 and 3 it will not be divisible by 6 then

by division it is not divisible by 7

so 589 is not divisible by 2 and 4 it is also not divisible by 8

589 is not divisible by 3 so it will also not divisible by 9

the end of the digit is not 0 so it will also not divisible by 10

by division we can check it's not divisible by 11

it's not divisible by 6 and 2 both so it is not divisible by 12 either and so on............

thank you