burger fun / Four Fours / Solver
Make 93 with four 4s
The classic four fours puzzle: build an expression from exactly four 4s that equals 93. 93 cannot be made from four 4s at all under these rules — tiers 1 and 2 are proven exhaustively, and the bounded tier-3 search came up empty too.
Solutions using only + - × ÷
No expression made of four plain 4s and + - × ÷ reaches 93 — the solver checked every possible expression.
Solutions with concatenation and decimals
Concatenation and decimals do not help for 93 either — every combination was checked.
Solutions with square roots, factorials, exponents
No solution found at this tier within the solver’s search bounds — square roots, factorials, and exponents all come up empty.
Zero solutions found. Not for lack of trying — the solver tried everything its rules allow.
Make 92 with four 4s · Make 94 with four 4s
The Number Lab
Same idea, different constraints: four 9s, four 4s, or any four digits you like.
- Four Nines — the daily puzzle
- Four Nines solver — every target, solved
- Four Fours — the 1881 original
- Four Fours solver — including the impossible five
- Make 24 solver — any four digits
- Today's 24 — one new hand a day
Read up on the 1881 original, pick another number in the solver, or find more free math games.