brain teaser

mystiv SG

alright. a little brain teaser for you guys Laughing

using the numbers 1, 5, 5 and 5, form an equation that would give the product 24. you have to use each number once, and mathematical signs once or never

note: mathematical signs only include +, -, *, / and brackets

understand?

mystiv SG

no one wanna give it a try? Laughing

akinos SG

(5×5) – 1^5 ?

mystiv SG

no Laughing

again, i emphasize that mathematical signs only include + - * / and ( )

no power, no differentiation or whatever

mystiv SG

alright. another one. simpler this time

the above picture shows a chessboard with 2 of its edges removed. is it possible to arrange 31 dominoes so that each one covers exactly 2 squares?

and do try to find an explanation instead of just trying out all the possible ways Laughing

akinos SG

oh i see... then it* will be (5 - 1/5) x 5

edited: i lazy to explain and i dun even bother.. i prefer the traditional way of slowing putting in one by one xD.

mystiv SG

answer to the 1st question is correct Laughing

mystiv SG

lazy people who dont wanna think Twisted Evil