Question

magic square by using nu
3) Check whether 345111 is divisible by 3?​

Answer 1

Yes it is divisible by 3 .

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Answer 2

Yes it is divisible by 3. And quotient is 115037.

Divisibility by 2: The last digit of the number to be divided should be even.

Trick for Divisibility by 3: If the sum of digits of the number to be divided is divisible by 3, the number is divisible by 3.

Trick for Divisibility by 4: The last two digits of the number to be divided should be divisible by 4, then the whole number is divisible by 4.

Divisibility by 5: The last digit should be 5 or 0.

Divisibility by 6: The number should be divisible by 2 and 3 both.

Trick for Divisibility by 8: The last three digits of the number to be divided by 8 should be divisible by 8 then the whole number is divisible by 8.

Divisibility by 9: The number should be divisible by 3 and 6 both then the number is divisible by 9.

Divisibility by 10: The last digit should be 0 then the number is divisible by 10.

Trick for Divisibility by 11: The difference between sum of digits at odd places and sum of digits at even places should be 0.

Example: 121->Sum of digits at odd places i.e., 1+1 =2 and Sum of digits at even places i.e., 2 . So difference between sum of digits at odd and even places is 2-2 =0 . So this number is divisible by 11.

Hope this all helps U.

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