Question

write the following divisibility test for 3,4 and g coith their example​

Answer 1

Answer:

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Step-by-step explanation:

If the sum of the digits of a number is divisible by 3, then the number is divisible by 3.

Some examples of numbers divisible by 3 are as follows.

1) The number 85203 is divisible by 3 because the sum of its digits 8+5+2+0+3=18 is divisible by 3.

2) The number 79154 is not divisible by 3 because the sum of its digits 7+9+1+5+4=26 is not divisible by 3.

A number is divisible by 4 if the number is formed by its digits in ten’s place and unit’s place (i.e. the last two digits on its extreme right side) is divisible by 4.

Consider the following numbers which are divisible by 4 or which are divisible by 4, using the test of divisibility by 4:

1) 124  - In 124 the last two digits on its extreme right side is 24 which is divisible by 4.  Hence, 124 is divisible by 4.

2) 117  - In 117 the last two digits on its extreme right side is 17 which is not divisible by 4.  Hence, 117 is not divisible by 4.