Question

divisibility test of 2, 3, 7, 8 with suitable example

Answer 1

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# Divisibility Test of 2 :

If the last digits have the unit place as 2,4,6,8... so we can tell, that's number divisible by 2.

# Divisibility test of 3 :

The sum of all digits equals to numbers equal to multiple by 3. it can be said as divisible by 3.

# Divisibility test of 7 :

Double the last digit and subtract it from the remaining leading truncated number, so the number is divisible by 7.

# Divisibility test of 8 :

If the last three digits are divided by 8 i.e. of whole number, said as divisible by 8.

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Answer 2

For 2
 if the last digit  n of  is 2, 4, 6, 8, or 0;

For 3
 if the sum of digits of n  is a multiple of 3;

For 7

if subtracting twice the last digit of n  from the remaining digits gives a multiple of 7 


For 8
if the last 3 digits of n are a multiple of 8