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What ways to make 21?

Updated: 10/24/2023

Wiki User

11y ago

There are infinitely many possible additions:

10+11, 9+12, 8+13, 7+14, ....

and then

10.5+10.5, 10.4+10.6, 10.3+10.7, 10.2+10.8, ....

and then 2 digit

10.49 + 10.51, 10.48+10.52, ...

and 3 digit, 4 digit, ... infinitely many digits.

Next, you can look at multiplication:

1x21, 2x10.5, 3x7, and so on

and then 0.1x210, 0.2*105, 0.3*70 and so on

and then 2 digit decimals fractions, and then 3 digit, 4 digit, and so on, and on.

And I have not even started on 3 or more numbers, or powers and other mathematical functions.

Wiki User

11y ago

7mo ago

There are several ways to make 21, such as adding 10 and 11, adding 15 and 6, or multiplying 3 and 7. Another way is subtracting 1 from 22.

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