MindProofTarget Number · Make 18
Use 1, 2, 4, 9 exactly once to make 18. Use +, −, ×, ÷ and parentheses. Fractional and negative intermediate values are allowed.
target-v2-004Hard
1249
Get a hint
Divide 9 by one half.
One valid solution
2 ÷ 4 = 0.5; 1 − 0.5 = 0.5; 9 ÷ 0.5 = 18.
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