Question

Given that n is an even Integer, chaz conjectured that n is divisible by 4 which number is a counter example to Chaz’s conjecture

Answer 1

By definition, a number is divisible by 4 if the last two digits of the number are divisible by 4.

A number can be even while not being divisible by 4.

For example, the number 218 is even, but is not divisible by 4 since 18 is not divisible by 4.

Hope this helps.

頑張って!

Answer 2

Explanation:

2 and 6 are the first 2 counterexamples. Any number that has only 1 two as its prime factors cannot be divisible by 4.

2 * 5 * 7 = 70 which is not divisible by 4.

If the number has more than one 2 as a prime factor, it is divisible by 4.