What is 40 cubed?

Answer 1

To cube a number means simply to multiply that number by itself 3 times. To work out 40 cubed you would simply go:

403 = 40 x 40 x 40

40 x 40 = 1,600

1,600 x 40 = 64,000

403=64,000

Therefore, 40 cubed equals 64,000.

The phrase "multiply that number by itself 3 times." can cause confusion.

Sometimes, instead of multiplying it thrice (the number itself) others, due to confusion, just multiply the number by 3... take note it's cube...

What do you get if you multiply 40 by itself once?

Nearly everyone would say 1,600 which is 40².

Multiply that by 40 then seems to mean multiply the answer by 40, giving 64,000 which is then 40 multiplied by itself twice!

Of course some people will say it doesn't matter how many times you multiply 40 by itself you'll always get 1,600.

Just think of 40³ as meaning 3 40s multiplied together and you should avoid any problems.

Answer 2

Cubed means to take whatever number and multiply that number by itself three times. So 40 cubed means to take 40 times itself three times. Be very careful because it's not 40 times 3, which is a very common mistake! It's 40 times itself 3 times.

Answer 3

To cube a number is to x it by itself 3 times so 40 x 40 x 40 = 64,000

Answer 4

40 * 40 * 40

= 1600 * 40

= 64000

note: this * in my solution means multiplied by.

Answer 5

404040 = 64000

Answer 6

640000

Answer 7

64000

Answer 8

80

Answer 9

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Answer 10

64000