lexirich9
contestada

9+10=21

Yes, my calculation says , it is possible.

But only in other number base.

Let me explain.

9 + 10 = 21

or, 19 = 21

Assume that , 19 is a decimal number.

and 21 is a n base number.

As 19 is equivalent to 21,

So 10 base 19 is equivalent to n base 21.

So with the help of math I can get that,

19 = 1 × 10^1 + 9× 10^0

21 = 2 ×n^1 + 1×n^0 = 2n + 1

So , 2n + 1 = 19

or, 2n = 18

or, n = 9

So finally, we can say that,

10 base 19 = 9 base 21

Thus 9+10=21 is possible

Respuesta :

The reason why people sometimes assume that the calculation 9 + 10 = 21 is as explained below.

How to calculate in number bases?

We want to find out the reason why people say that; 9 + 10 = 21

Now, the way you have explained it is one way to look at it by utilizing number bases to play around with the figures to arrive at 21.

However, another way is to use algebra trick pattern which is;

9 can be expressed as 3 * 3

Also, 10 can be expressed as 5 * 2. Thus, we now have;

(3 * 3) + (5 * 2)

The applying properties of algebra to cross multiply gives;

(3 * 2) + (5 * 3)

= 6 + 15

= 21

Now, though your explanation arrived at 21 and mine also 21, but those are not correct mathematical methods as 9 + 10 must be equal to 19 and not 21.

Read more about Number bases at; https://brainly.com/question/8649831

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