Post by: Roflmao on November 07, 2008, 08:07:58 pm
a 2 - digit number a multiple of 7 the product of it's digits is 16
a square number below 50, the sum of its digits is 9
I was hoping someone can explain these to me
Post by: Roflmao on November 07, 2008, 08:09:21 pm
We have a two-digit number, the sum of its digits is 5.
There are only five such numbers: .\begin{Bmatrix}14 \\ 23 \\ 32 \\ 41 \\ 50 \end{Bmatrix}
Only one is a multiple of 4: .32
Post by: onlyfknhuman on November 07, 2008, 08:10:34 pm
Sounds like a maths tongue twister.
Post by: shinny on November 07, 2008, 08:13:52 pm
Post by: Flaming_Arrow on November 07, 2008, 08:15:43 pm
2. 28
3. 36
Post by: Mao on November 07, 2008, 08:17:18 pm
Post by: Flaming_Arrow on November 07, 2008, 08:18:20 pm
Post by: shinny on November 07, 2008, 08:18:35 pm
2. 28
3. 36
As for how to solve it, just guess. Trust me, it's MUCH faster than using algebra to solve them. I generally started with the second clue and worked out all the possible combinations, and checked them against the second clue.
Post by: Flaming_Arrow on November 07, 2008, 08:19:19 pm
Post by: Roflmao on November 07, 2008, 08:20:09 pm
Post by: ell on November 07, 2008, 08:34:22 pm
Post by: AppleXY on November 07, 2008, 08:38:07 pm
LOL LEGEND :D
BOOM
i'm saving that lol