Can You Solve the Number Puzzle (Cryptarithm) in 30 Seconds?

This Olympiad math tutorial video shows you how to solve an interesting number puzzle (Cryptarithm or alphametic puzzle) involving multiplication: ABCD x 9 = DCBA. You can feel strong logical reasoning from the solution.

You are welcome to watch and subscribe to the free math tutoring channel: Math Tutoring by Dr. Liang:    / @drliangmath  

For information on the background of Dr. Liang, please visit http://www.math-edu.ca/

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