Thursday, May 05, 2005
050505 quiz: You're probably aware of the "four 4s" puzzle in which four 4s are used to make a series of calculations with various answers. If not, see here. Today, in honour of 05/05/05, I offer the "five 5s" puzzle.
Can you use exactly five 5s and any mathematical operations* to make** all of the numbers from 0 to 30***?
*Acceptable mathematical operations: add, subtract, multiply, divide, brackets, fractions.
** For example, 31=5x5+5+5/5, 35=55-(5x5)+5 and 36=5x5+55/5
*** I can make all of the numbers from 0 to 30 bar three of them. Collectively, can you do better?
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