Move the center bar of the middle 4 to make a 9 on the right. You are left with three matches in the middle--6+3=9.

Re: Move one stick

Posted: Fri Jul 29, 2016 4:19 pm UTC

by HonoreDB

Spoiler:

You get at least one more if you allow bitwise operations: 6 | 4 ≠ 4

Re: Move one stick

Posted: Fri Jul 29, 2016 4:24 pm UTC

by SirGabriel

HonoreDB wrote:

Spoiler:

You get at least one more if you allow bitwise operations: 6 | 4 ≠ 4

I don't know what that means.

Re: Move one stick

Posted: Fri Jul 29, 2016 6:24 pm UTC

by HonoreDB

SirGabriel wrote:

HonoreDB wrote:

Spoiler:

You get at least one more if you allow bitwise operations: 6 | 4 ≠ 4

I don't know what that means.

Spoiler:

A Bitwise OR is an operator in programming, usually written as "|" in languages that have it. It essentially means: Write both values in base 2, then replace every 0 in one number with the corresponding digit of the other number. 6 is 110, while 4 is 10, so 6 | 4 is 6 (4 doesn't provide any 1s that aren't already in 6). It's normally used along with other bitwise operators like AND (&) to allow a number to compactly represent a bunch of different yes-or-no questions.