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Mathematics 7 Online
OpenStudy (anonymous):

Puzzle:

OpenStudy (anonymous):

1. Use only 3 three's and any mathematical operations to obtain 72.

OpenStudy (anonymous):

2. Use only two 5's and any of the mathematical operaters to obtain 6.

OpenStudy (anonymous):

The question says ONLY using three 3's. I'll clarify a little. Suppose it wanted to use 3 three's to get, say 21, Accepted : \[(3!)*3 + 3\]

hartnn (hartnn):

can i use gamma function ? :P

hartnn (hartnn):

3!*3!*(gamma 3) = 72

OpenStudy (anonymous):

72=(3!)^3 /3

OpenStudy (anonymous):

@sauravshakya You got it! @hartnn I did not think of that one. Nice. How about the second one?

OpenStudy (anonymous):

\[5+\frac{d5}{dx}!\]

OpenStudy (anonymous):

^^ Not allowed.

OpenStudy (anonymous):

Doesn't it count as an operator? \[5+(D5)!\]If you want to be pedantic...

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