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Q: What number when multiplied by itself gives 400?

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20 when multiplied by itself equals 400.

The answer is 20.

400*25 = 10,000

Well, a square number is the answer to a number multiplied by itself. So, what you'd have to do is multiply 20*20, and the answer is 400.

Any number can be multiplied by itself to create a result - in this case, 202 = 20 x 20 = 400.

Itself

400 multiplied by 8 is 3,200

400 multiplied by 20 is 8,000

200*200=400 200+200=400

Simple. When a number is 'squared' it simply means it is multiplied by itself. So, '20 squared' means 20 x 20, which equals 400.

Yes.

A square number is an integer which is the square of some smaller integer. For example, 144 is square because 144 = 12*12 = 12^2 400 is a square number because 400 = 20^2. Anything bigger than 20, when multiplied by itself, will make a square greater than 400. How about 21?

How about: 20*20 = 400

'20 squared' simply means 20 multiplied by itself (20 x 20). This equals 400.

88,400,000,000

90,000 multiplied by 400 is 36,000,000.

2,400 multiplied by 400 is 960,000.

400 multiplied by 19 is 7,600.

150 multiplied by 400 is 60,000.

400 multiplied by 3.14 is 1,256

79 multiplied by 400 is 31,600.

24,000

400

146,000

20 x 20