Normal calculation
Operation pattern
Use a two-digit number, division by a single digit, and multiplication by another single digit.
Arithmetic route
First divide forty-two by seven, then double the result.
Reveal answer
- 42/7*2
Why the answer fits
Multiplication and division share precedence and are evaluated left to right: 42 ÷ 7 gives 6, and 6 × 2 gives 12.
The spelling 42/7*2 occupies exactly six symbol positions: two digits, a division sign, a digit, a multiplication sign and a final digit. Equivalent calculations need their own feedback check.