Even and Odd Numbers — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. Which of these numbers is even?
A) 33
B) 47
C) 56
D) 81
An even number has a ones digit of 0, 2, 4, 6, or 8. Among the choices, only 56 ends in 6, so 56 is the even one.
2. The ones digit of every odd number is which set of digits?
A) 0, 2, 4, 6, 8
B) 1, 2, 3, 4, 5
C) 1, 3, 5, 7, 9
D) 2, 4, 6, 8, 10
The ones digit of every odd number is one of 1, 3, 5, 7, or 9. Numbers ending in 0, 2, 4, 6, or 8 are even, not odd.
3. Which statement about the number 68 is true?
A) 68 is odd because 6 is even
B) 68 is even because it ends in 8
C) 68 is odd because 6 + 8 = 14
D) 68 is even because it is greater than 50
Whether a number is even or odd depends only on its ones digit, not on the tens digit or the digit sum. 68 ends in 8, and 8 is an even digit, so 68 is even.
4. How many even numbers are between 11 and 20?
A) 3
B) 4
C) 5
D) 6
The even numbers between 11 and 20 are 12, 14, 16, 18, and 20 — that is 5 numbers in all.
Part B: Fill in the Blank
Write the correct answer on each line.
1. The number 95 is odd because it ends in 5.
95 ends in 5, and any number whose ones digit is 1, 3, 5, 7, or 9 is odd.
2. The smallest two-digit even number is 10.
Two-digit numbers start at 10, and 10 ends in 0, which makes it even. So 10 is the smallest two-digit even number.
3. The largest two-digit odd number is 99.
Two-digit numbers go up to 99, and 99 ends in 9, which is an odd digit, so 99 is the largest two-digit odd number.
4. The number 46 is even because it ends in 6.
46 ends in 6, and 6 is one of the even digits (0, 2, 4, 6, 8), so 46 is even.
5. There are 5 even numbers from 1 to 10.
From 1 to 10, the even numbers are 2, 4, 6, 8, and 10. Counting them gives 5.