Digit sum

Algebra Level 1

2 ( 6 + 4 ( 8 + 3 ( 1 + 5 ( 7 + 9 ) ) ) ) = ? 2(6+4(8+3(1+5(7+9))))=\ ?


The answer is 2020.

Rajen Kapur by Rajen Kapur , 72, India

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.

1 solution

Chew-Seong Cheong
Feb 20, 2020

X = 2 ( 6 + 4 ( 8 + 3 ( 1 + 5 ( 7 + 9 ) ) ) ) = 2 ( 6 + 4 ( 8 + 3 ( 1 + 5 ( 16 ) ) ) ) = 2 ( 6 + 4 ( 8 + 3 ( 1 + 80 ) ) ) = 2 ( 6 + 4 ( 8 + 3 ( 81 ) ) ) = 2 ( 6 + 4 ( 8 + 243 ) ) = 2 ( 6 + 4 ( 251 ) ) = 2 ( 6 + 1004 ) = 2 ( 1010 ) = 2020 \begin{aligned} X & = 2(6+4(8+3(1+5(7+9)))) \\ & = 2(6+4(8+3(1+5(16)))) \\ & = 2(6+4(8+3(1+80))) \\ & = 2(6+4(8+3(81))) \\ & = 2(6+4(8+243)) \\ & = 2(6+4(251)) \\ & = 2(6+1004) \\ & = 2(1010) \\ & = \boxed{2020} \end{aligned}

1 Helpful 1 Interesting 1 Brilliant 0 Confused

0 pending reports

×

Problem Loading...

Note Loading...

Set Loading...