Simple maths/233

What is 99 × 99 × 99 × 99 99 \times 99 \times 99 \times 99 ?

96059601 94728101 97463801 91023401

This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try refreshing the page, (b) enabling javascript if it is disabled on your browser and, finally, (c) loading the non-javascript version of this page . We're sorry about the hassle.

3 solutions

Chew-Seong Cheong
Sep 14, 2018

N = 9 9 4 = ( 100 1 ) 4 = 10 0 4 4 × 10 0 3 + 6 × 10 0 2 4 × 100 + 1 = 100 , 000 , 000 4 , 000 , 000 + 60 , 000 400 + 1 = 96 , 059 , 601 \begin{aligned} N & = 99^4 \\ & = (100-1)^4 \\ & = 100^4 - 4 \times 100^3 + 6 \times 100^2 - 4 \times 100 + 1 \\ & = 100,000,000 - 4,000,000 + 60,000 - 400 + 1 \\ & = \boxed{96,059,601} \end{aligned}

The first number is the only number that is divisible by 9.

B D
Sep 10, 2018

Use a calculator.

You lozers

yuhan zhai - 2 years, 9 months ago

Log in to reply

What!? Then what is the way to solve it?

B D - 2 years, 9 months ago

0 pending reports

×

Problem Loading...

Note Loading...

Set Loading...