Question

Consider the number 9,953.

Is this number divisible by 2, 3, 4, 5, 9, or 10? Provide justification for
each number without using a calculator.
Hint: If a number is not divisible by 2, then what other numbers is it
also not divisible by?
Write your answer in complete sentences.

Answer 1

No for all of them

Explanation:

2 --> not even

3 --> of the sum of the numbers are not divisible by three

4 --> the last two digits are not equal to a multiple of four

5 --> the last digit is not ending with 0 or 5

9 --> the sum of the digits is not equal to a multiple of nine

10 --> the last number is not zero