Divisibility of a number by 3 shortcut tricks

Divisibility of a number by 3
we are try to calculate divisibility of a number by 3 or  any number using divisor 3, but if any large numbers is given we are not able to perform fast ,and using some rule and shortcut tricks we are calculate the divisibility of a numbers by 3.


Divisibility of a number by 3
If the Sum or addition of all numbers that is given is divisible by 3 then the number is divisible by 3.

Example: 861 / 3 = 287. (8+6+1) = 15 and 15 is divisible by 3, So the 861 is divisible by 3.

Example: 22104 / 3 = 7368. (2+2+1+0+4) = 9. 9 / 3 = 3, So 22104 divisible by 3.

Example: 99954 / 3 = 33318. (9+9+9+5+4) = 36. 36 / 3 = 12, So 99954 divisible by 3

Example: 87921 / 3 = 29307. (8+7+9+2+1) = 27. 27 / 3 = 9, So 87921 divisible by 3

Example: 69321 / 3 = 23107. (6+9+3+2+1) = 21. 21 / 3 = 7, So 69321 divisible by 3

Example: 1359 / 3 = 453. (1+3+5+9) = 18. 18 / 3 = 6, So 1359 divisible by 3


Note: So Before going to divisible by 3 any number, first check the addition of all numbers is divisible by 3.

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