Even & Odd Numbers — Answer Key
Part A: Sort the Words
Sort each word or number into the correct category box.
1. Sort each number: even or odd.
Even
142618 Odd
9511 Check the last digit of each number. 14, 26, and 18 end in 4, 6, and 8, which are even digits, while 9, 5, and 11 end in odd digits.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. The number 20 is an even number.
20 ends in a 0, and any number that ends in 0, 2, 4, 6, or 8 is even. You can also share 20 items into two equal groups of 10.
2. An odd number always ends in 1, 3, 5, 7, or 9.
The five odd digits are 1, 3, 5, 7, and 9, so the last one missing is 9. Any number ending in one of these digits is an odd number.
3. The number 13 is an odd number.
13 ends in 3, which is one of the odd digits. If you tried to split 13 things into two equal groups, one would always be left over.
4. If you have 8 stickers, you can split them into 2 equal groups of 4.
8 is even because 4 plus 4 equals 8, so each group gets 4 stickers. Even numbers always split evenly into two equal groups.
5. The next even number after 16 is 18.
Even numbers count up by 2s, so after 16 you skip 17 and land on 18. The 17 in between is odd.
Part C: True or False?
Read each statement. Circle True or False.
1. The number 12 is an odd number.
True False
12 ends in 2, which is an even digit, so 12 is actually even. You can split 12 evenly into two groups of 6.
2. All numbers ending in 0 are even.
True False
0 is one of the even digits, so any number that ends with 0, like 10, 30, or 100, is even. These numbers always split into two equal halves.
3. The number 25 is an even number.
True False
25 ends in 5, which is an odd digit, so 25 is really an odd number. If you split 25 into two groups, one group would have 12 and the other 13.
4. You can split an even number into two equal groups.
True False
That is the key idea of an even number: it splits cleanly into two equal piles. Odd numbers always leave one extra piece.