21 Times Table

The twenty-one times table, from 21 × 1 to 21 × 12.

Practice the 21s

5 questions from the 21 times table. Type each answer and press Check.

The last digits run 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 and then start over, so they cycle through every digit from 0 to 9 once.
21 is odd, so the answers alternate odd, even, odd, even.
Because 21 is a multiple of 3, the digits of every answer add up to a multiple of 3 (keep adding until you get one digit and it is always 3, 6 and 9).
21 = 3 × 7, so you can multiply by 3 and then by 7.

Every multiplication fact gives you a division fact for free. Because 21 × 8 = 168, you also know 168 ÷ 21 = 8 and 168 ÷ 8 = 21.

From 21 × 1 to 21 × 10 the answers are 21, 42, 63, 84, 105, 126, 147, 168, 189, 210. Carrying on, 21 × 11 = 231 and 21 × 12 = 252.

Twenty times, then add one more. Example: 21 × 6 = 120 + 6 = 126.

21 × 12 = 252. You can also find it as 21 × 10 + 21 × 2 = 210 + 42 = 252.

21 × 20 = 420. Double 21 to get 42, then add a zero.