Times tables·2 × 21

2 × 21 =

42

2 × 21 = 42 — times table fact

2 times table

2 × 21 = 42. Counting 2 21 times gives the same as counting 21 2 times, and 42 ÷ 2 = 21 takes you back.

Product: 42
Order does not matter: 21 × 2 = 42
As division: 42 ÷ 2 = 21 · 42 ÷ 21 = 2
One step back: 2 × 20 = 40
One step on: 2 × 22 = 44
Other pairs with the same product: 3 × 14 · 6 × 7
Square: No
Even: Yes

Nearby in the same table

2 × 18 = 36 2 × 19 = 38 2 × 20 = 40 2 × 22 = 44

The whole grid

Row meets column at the product. The diagonal holds the squares, and the two halves mirror each other — which is why 7×8 and 8×7 share one page.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 72 76 80 84 88 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 6 12 18 24 30 36 42 48 54 60 66 72 78 84 90 96 102 108 114 120 126 132 7 14 21 28 35 42 49 56 63 70 77 84 91 98 105 112 119 126 133 140 147 154 8 16 24 32 40 48 56 64 72 80 88 96 104 112 120 128 136 144 152 160 168 176 9 18 27 36 45 54 63 72 81 90 99 108 117 126 135 144 153 162 171 180 189 198 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 11 22 33 44 55 66 77 88 99 110 121 132 143 154 165 176 187 198 209 220 231 242 12 24 36 48 60 72 84 96 108 120 132 144 156 168 180 192 204 216 228 240 252 264 13 26 39 52 65 78 91 104 117 130 143 156 169 182 195 208 221 234 247 260 273 286 14 28 42 56 70 84 98 112 126 140 154 168 182 196 210 224 238 252 266 280 294 308 15 30 45 60 75 90 105 120 135 150 165 180 195 210 225 240 255 270 285 300 315 330 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 256 272 288 304 320 336 352 17 34 51 68 85 102 119 136 153 170 187 204 221 238 255 272 289 306 323 340 357 374 18 36 54 72 90 108 126 144 162 180 198 216 234 252 270 288 306 324 342 360 378 396 19 38 57 76 95 114 133 152 171 190 209 228 247 266 285 304 323 342 361 380 399 418 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 21 42 63 84 105 126 147 168 189 210 231 252 273 294 315 336 357 378 399 420 441 462 22 44 66 88 110 132 154 176 198 220 242 264 286 308 330 352 374 396 418 440 462 484

How to read this

Swapping the order does not change the answer, so 7×8 and 8×7 are one page.
Moving one step along adds that table — the sevens grow by seven each time.
Division undoes multiplication: 56 ÷ 7 = 8 means 7 × 8 = 56.
Some products come from more than one pair — 24 is 3×8 and also 4×6.

Frequently asked questions

Q. What is 2 times 21?

42.

Q. Is 21 times 2 the same?

Yes — swapping the order never changes a product.

Q. How does it undo as division?

42 ÷ 2 = 21, 42 ÷ 21 = 2.

Q. Which other pairs make 42?

3 × 14, 6 × 7 also give 42.