Times Table Test

21 times table

Think of 21 as 20 + 1 and the 21 times table turns into two tables you already know: the 20s and the 1s. Learn it here with seven practice activities, tricks, worked examples and printable sheets.

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The 21 times table

  • 21×1=21
  • 21×2=42
  • 21×3=63
  • 21×4=84
  • 21×5=105
  • 21×6=126
  • 21×7=147
  • 21×8=168
  • 21×9=189
  • 21×10=210
  • 21×11=231
  • 21×12=252
  • 21×13=273
  • 21×14=294
  • 21×15=315
  • 21×16=336
  • 21×17=357
  • 21×18=378
  • 21×19=399
  • 21×20=420

Split 21 into 20 and 1: work out the 20s and the 1s, then add them. Split 21 into 20 and 1. 20 × 7 = 140 and 1 × 7 = 7, so 21 × 7 = 140 + 7 = 147.

Seven ways to practise

Work through the activities from left to right. Each one asks a little more of you, and a tick appears when you finish it. Your progress is saved on this device.

Your progress 0 of 7 done

Tricks for the 21 times table

Pick the trick that clicks for you. Each one is a different way to the same answer.

Split it: 20 + 1

Split 21 into 20 and 1: work out the 20s and the 1s, then add them.

21 × 7 = 140 + 7 = 147

Use the table before

Know the 20 times table? Add one more lot: 21 × 7 is 20 × 7 plus 7.

140 + 7 = 147

The last digits repeat

Look at the last digit of each answer from 21 × 1 to 21 × 10. The same pattern repeats for the next ten answers, so learn it once.

1, 2, 3, 4, 5, 6, 7, 8, 9, 0

Turn it around

21 × 3 is the same as 3 × 21. If you know the 3 times table, you already know this fact, and the same goes for every table you have learned.

3 × 21 = 21 × 3 = 63

Count in 21s

Each answer is 21 more than the one before, so you can always count on from a fact you know.

21, 42, 63, 84, 105

The square fact

21 × 21 = 441 is a square number: 21 rows of 21 make a perfect square. Square facts are good anchors to work from.

21 × 21 = 441

Worked examples

How each answer is found, step by step.

21 × 6

Split 21 into 20 and 1. 20 × 6 = 120 and 1 × 6 = 6, so 21 × 6 = 120 + 6 = 126.

21 × 6 = 120 + 6 = 126

7 × 21

The order does not matter: 7 × 21 is the same as 21 × 7. Split 21 into 20 and 1. 20 × 7 = 140 and 1 × 7 = 7, so 21 × 7 = 140 + 7 = 147.

7 × 21 = 147

21 × 12

Split 21 into 20 and 1. 20 × 12 = 240 and 1 × 12 = 12, so 21 × 12 = 240 + 12 = 252.

21 × 12 = 240 + 12 = 252

21 × 17

Split 21 into 20 and 1. 20 × 17 = 340 and 1 × 17 = 17, so 21 × 17 = 340 + 17 = 357.

21 × 17 = 340 + 17 = 357

168 ÷ 21

Ask how many 21s make 168. You know 21 × 8 = 168, so the answer is 8.

168 ÷ 21 = 8

21 × ? = 294

Ask how many 21s make 294. Divide to find it: 294 ÷ 21 = 14.

21 × 14 = 294

21 times table word problems

Spotting that a story needs 21 × something is a skill of its own. Work each one out first, then open the answer.

Block towers

Each tower is 21 blocks tall. Sam builds 4 towers. How many blocks does he use?

Show the answer
21 × 4 = 84 blocks

Cutting ribbon

A ribbon 147 cm long is cut into pieces that are 21 cm long. How many pieces are there?

Show the answer
147 ÷ 21 = 7 pieces

Rows of chairs

The school hall has 9 rows of chairs with 21 chairs in each row. How many chairs are there?

Show the answer
9 × 21 = 189 chairs

Daily reading

Mia reads 21 pages every day for 12 days. How many pages does she read?

Show the answer
21 × 12 = 252 pages

School trip

Each minibus carries 21 children. How many children can 15 minibuses carry?

Show the answer
21 × 15 = 315 children

Tulip garden

A garden has 6 rows of tulips with 21 tulips in each row. How many tulips are there?

Show the answer
6 × 21 = 126 tulips

Test yourself: 10 questions with answers

Say each answer out loud before you open it. If you get all ten, try the 60-second test above.

1. What is 21 × 8?
168. Eight lots of 21.
2. What number times 21 makes 105?
5. 105 ÷ 21 = 5.
3. Is 21 × 11 = 232?
No, it is 231. 21 × 10 = 210 is a good place to start, then add one more 21.
4. How many 21s are there in 189?
9. 9 × 21 = 189.
5. What is 21 × 0?
0. No groups of 21 is nothing at all.
6. What is 21 × 15?
315. Ten lots of 21 plus five lots of 21.
7. What is 273 ÷ 21?
13. 21 × 13 = 273.
8. Which is bigger: 21 × 9 or 9 × 22?
9 × 22 = 198. It is bigger than 21 × 9 = 189 by exactly 9.
9. What comes next: 126, 147, 168, …?
189. Counting in 21s, each step adds 21.
10. If 21 × k = 336, what is k?
16. 336 ÷ 21 = 16.

The 21 times table up to 200

Need bigger facts? See the full list of the 21 times table up to any of these numbers.

Times tables sheet generator

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Times tables exam generator

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Questions about the 21 times table

What is the 21 times table?
The 21 times table is the list of answers you get when you multiply 21 by other numbers: 21 × 1 = 21, 21 × 2 = 42, 21 × 3 = 63, 21 × 4 = 84, 21 × 5 = 105, 21 × 6 = 126, 21 × 7 = 147, 21 × 8 = 168, 21 × 9 = 189, 21 × 10 = 210.
What is the trick for the 21 times table?
Split 21 into 20 and 1: work out the 20s and the 1s, then add them. For example: 21 × 7 = 140 + 7 = 147.
What is 21 × 12?
21 × 12 = 252. One way to work it out: 21 × 12 = 240 + 12 = 252.
How can I learn the 21 times table fast?
Learn the pattern first, then practise a little every day. Work through the seven activities on this page in order: fill in the table, shuffle it, match the answers, then race the clock. Five minutes a day is enough for most children to know the 21 times table within a week or two.
Which times table should I learn after the 21s?
A good next step is the 22 times table. Each new table borrows facts you already know, so it gets easier every time.

Learn the other times tables

Every fact you learn here turns up in another table too — 21 × 7 is also in the 7 times table.