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The Sevenths Wheel

#977

The Sevenths Wheel

MediumMental MathPRO

Reported at:Optiver SIG

More Mental Math to train on

The 11-Times Slide
Double One, Halve the Other
97 × 96 Without Grinding
Up 20%, Down 20%

All Mental Math questions →

← 18% of 450, No Paper Rule of 72 →

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