The expression 7 × 7 ÷ 7 − 1 must be solved using the correct order of operations.
Multiplication and division have equal priority, so calculate them from left to right:
7 × 7 = 49
49 ÷ 7 = 7
Now subtract:
7 − 1 = 6
The correct answer is 6.
Many people get this puzzle wrong because they divide before multiplying instead of working from left to right.
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