Even and Odd Numbers 1 to 80
Parity of numbers 1 through 80. Even numbers end in 0, 2, 4, 6, or 8; odd numbers end in 1, 3, 5, 7, or 9.
The rhythm never breaks — odd, even, odd, even from 1 to 80: exactly 40 of each. Sums follow rules of their own: even + even stays even, odd + odd flips to even, and mixed pairs stay odd — parity is the fastest sanity check in arithmetic.
| Number | Parity |
|---|---|
| 1 | odd |
| 2 | even |
| 3 | odd |
| 4 | even |
| 5 | odd |
| 6 | even |
| 7 | odd |
| 8 | even |
| 9 | odd |
| 10 | even |
| 11 | odd |
| 12 | even |
| 13 | odd |
| 14 | even |
| 15 | odd |
| 16 | even |
| 17 | odd |
| 18 | even |
| 19 | odd |
| 20 | even |
| 21 | odd |
| 22 | even |
| 23 | odd |
| 24 | even |
| 25 | odd |
| 26 | even |
| 27 | odd |
| 28 | even |
| 29 | odd |
| 30 | even |
| 31 | odd |
| 32 | even |
| 33 | odd |
| 34 | even |
| 35 | odd |
| 36 | even |
| 37 | odd |
| 38 | even |
| 39 | odd |
| 40 | even |
| 41 | odd |
| 42 | even |
| 43 | odd |
| 44 | even |
| 45 | odd |
| 46 | even |
| 47 | odd |
| 48 | even |
| 49 | odd |
| 50 | even |
| 51 | odd |
| 52 | even |
| 53 | odd |
| 54 | even |
| 55 | odd |
| 56 | even |
| 57 | odd |
| 58 | even |
| 59 | odd |
| 60 | even |
| 61 | odd |
| 62 | even |
| 63 | odd |
| 64 | even |
| 65 | odd |
| 66 | even |
| 67 | odd |
| 68 | even |
| 69 | odd |
| 70 | even |
| 71 | odd |
| 72 | even |
| 73 | odd |
| 74 | even |
| 75 | odd |
| 76 | even |
| 77 | odd |
| 78 | even |
| 79 | odd |
| 80 | even |
Frequently asked questions
What are the even numbers from 1 to 80?
The even numbers up to 80 are 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24….
How do you tell if a number is even or odd?
Look at the last digit: 0, 2, 4, 6, or 8 means even; 1, 3, 5, 7, or 9 means odd. The rest of the number never changes parity.
Is 0 even or odd?
0 is even — it fits the rule (ends in 0) and 0 = 2 × 0, so it divides by 2 with no remainder.