Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °
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#1 2005-08-23 19:06:30
- MathsIsFun
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Two emailed Puzzles
A visitor has asked me by email:
I need a solution for the below questions:
Can you write 31 by usingly only digit 3 five times?
Can you place 10 coins in a five straight lines each having four coins?
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
#2 2005-08-23 20:38:24
- mathsyperson
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Re: Two emailed Puzzles
Well, the second one is a star:
O
O O O O
O O
O
O O
It would work if I could draw better, but you see what I mean.
The first one I'll have to think about.
Why did the vector cross the road?
It wanted to be normal.
#3 2005-08-23 20:44:12
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Re: Two emailed Puzzles
3^3 + 3 + 3/3 = 27 + 3 + 1 = 31
(That star would make a good logo !)
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman
#5 2005-08-24 21:29:09
- mathsyperson
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Re: Two emailed Puzzles
Technically, the answer to both is 'yes'.
Why did the vector cross the road?
It wanted to be normal.
#6 2005-08-24 22:09:46
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Re: Two emailed Puzzles
And I thought the answer to both was 31 ... silly me.
"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman