Question

Which one doesn’t belong?

Write a reason for each number for why they could be the one which doesn’t belong: 36, 99, 9, 123.

Answer 1

In this Mathematics question, we need to determine which number doesn't belong out of 36, 99, 9, and 123. Each number has a unique reason for not belonging, such as being divisible by 3 or containing a different number of digits.

Step-by-step explanation:

Based on the given question, we need to determine which number doesn't belong out of 36, 99, 9, and 123. Here are the reasons for each number:

1. 36: This number is the only one that is divisible by 3, since the sum of its digits (3 + 6 = 9) is divisible by 3.
2. 99: This number is the only one that is made up of two identical digits.
3. 9: This number is the only single-digit number.
4. 123: This number contains three digits, unlike the other numbers which have two digits.

Therefore, the number that doesn't belong is 123 because it has a different number of digits compared to the other numbers.