Make 44 with four 9s

The classic four nines puzzle: build an expression from exactly four 9s that equals 44. 44 cannot be made with + - × ÷, concatenation, or decimals (the solver checked every expression) — solutions need square roots, factorials, or exponents.

Solutions using only + - × ÷

No expression made of four plain 9s and + - × ÷ reaches 44 — the solver checked every possible expression.

Solutions with concatenation and decimals

Concatenation and decimals do not help for 44 either — every combination was checked.

Solutions with square roots, factorials, exponents

9 × sqrt(9)! - 9 / .9 = 44
sqrt(9)!! / 9 - sqrt(9)! × sqrt(9)! = 44

2 distinct solutions found in total, after removing trivial rearrangements.

Make 43 with four 9s · Make 45 with four 9s

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