Math Is Fun Forum
Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °
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#226 Re: Help Me ! » Make 1000 using 6 8's » 2012-01-11 01:29:29
It does, but I don't know it! All my attempts end up in using 7 8's or more!
#227 Re: Puzzles and Games » 5 balls with 5 weighings » 2012-01-11 00:06:20
Sorry Bob, I just clarified that we are using a balance scale!!
#228 Puzzles and Games » 5 balls with 5 weighings » 2012-01-10 22:51:06
- anna_gg
- Replies: 6
We have 5 balls of identical shape and volume, but with different weights, 10, 20, 30 40 and 50 grams.
How can we determine the weight of each ball by only 5 weighings? We must use a balance scale!
#229 Help Me ! » Make 1000 using 6 8's » 2012-01-10 22:25:40
- anna_gg
- Replies: 17
Use number 8 6 times to make 1000.
You can only use +, -, *, /, square root and parenthesis ().
No factorials, 3rd root or any other numbers.
Thank you!!!