how to check the divisibility of 2,3,5,7 and 9.
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2 =even number ,3= sum of all the digit,5=in last 0,5shall be there,7=sum of odd&even and their differnce,9=summ of all the digit
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2 -If the number contains 0,2,4,6,8, at unit place
Then it is divisible by 2
3-If the sum of all number is divisible
Like 214 then it is like 2 +1+4=6
this is divisible by 3
5- If the unit place contains 0 or 5 then it is divisible by 5
7-Remove the last digit, double it, subtract it from the truncated original number and continue doing this until only one digit remains. If this is 0 or 7, then the original number isdivisible by 7. Example: 1603 -> 160-2(3)=154 -> 15-2(4)=7, so 1603 is divisible by 7.
9-If sum of all number is divisible by 9 then it is divisible by 9
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2 -If the number contains 0,2,4,6,8, at unit place
Then it is divisible by 2
3-If the sum of all number is divisible
Like 214 then it is like 2 +1+4=6
this is divisible by 3
5- If the unit place contains 0 or 5 then it is divisible by 5
7-Remove the last digit, double it, subtract it from the truncated original number and continue doing this until only one digit remains. If this is 0 or 7, then the original number isdivisible by 7. Example: 1603 -> 160-2(3)=154 -> 15-2(4)=7, so 1603 is divisible by 7.
9-If sum of all number is divisible by 9 then it is divisible by 9
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