Daily Math Challenge

Sharpen your math skills with a new problem every Tuesday to Friday. These daily challenges are perfect for those who enjoy quick, engaging puzzles.

Problem 1472

Posted: December 12, 2025

94 % of users got this correct

The multiplicative digital root of a number is found by multiplying the digits of the number together and repeating until you get a single-digit number. For example, starting with 39 -> 3*9 = 27 -> 2*7 = 14 -> 1*4 = 4. So the multiplicative digital root of 39 is 4. Find the multiplicative digital root of 6779.

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