Actually...

Logic Level 4

a b c d e f ‾ = ( a b c ‾ + d e f ‾ ) 2 \overline{abcdef} = (\overline{abc} + \overline{def})^2

a a ; b b ; c c ; d d ; e e ; f f doesn't have to be specific digits such that they satisfy the above equation.

Find a b c ‾ ⋅ d e f ‾ ≥ 20000 \overline{abc} \cdot \overline{def} \ge 20000 .


The answer is 103246.

Thành Đạt Lê by Thành Đạt Lê , 17, Singapore

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