Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ ¹ ² ³ °
 

You are not logged in. #1 20060130 14:25:54
why does the 5 square trick workWhen you want to square a number ending in a 5, you take the tens column and add one and multiply it to the original tens digit and place it in front of 25... not a good description. #3 20060130 15:44:05
Re: why does the 5 square trick work
If that wasn't clear, what you are doing is getting them number a(a+1) like you said (3*4), and then shifting that over two digits to make room for the 25 on the right. "In the real world, this would be a problem. But in mathematics, we can just define a place where this problem doesn't exist. So we'll go ahead and do that now..." #4 20060130 19:18:29
Re: why does the 5 square trick workto square a 2 digit number ending with 5 you have to follow these steps : ImPo$$!BLe = NoTH!nG Go DowN DeeP iNTo aNyTHinG U WiLL FinD MaTHeMaTiCs ... #7 20060130 19:29:58
Re: why does the 5 square trick work
he said that it doesnt work with 35 ! so i showed him ... sorry maybe i didn't get your question explain more man Last edited by RauLiTo (20060130 19:30:41) ImPo$$!BLe = NoTH!nG Go DowN DeeP iNTo aNyTHinG U WiLL FinD MaTHeMaTiCs ... #9 20060130 20:40:32
Re: why does the 5 square trick work
i got the right question now (( sorry for bothering man but i am new here )) ... i think i agree with your solution ImPo$$!BLe = NoTH!nG Go DowN DeeP iNTo aNyTHinG U WiLL FinD MaTHeMaTiCs ... #10 20060201 12:34:27
Re: why does the 5 square trick workIn general any two digit square equals; 