4 Numbers
Algebra
Level
1
\[\begin{align} \text{Numbers: }&1,\ 9,\ 21,\ 32\\ \text{Operations: }&+,\ -,\ \times,\ \div,\ (\ ) \end{align}\]
Using all 4 of the above numbers, any of the 4 operations, and any number of parentheses, can you write an expression that equals 24?
\(\)
Details and Assumptions:
- Each number has to be used exactly once.
- Each operation can be used as many times as desired.
- No other operations are allowed: in particular, concatenation, square roots, factorials, etc.
by
Michael Huang