Educational > Interesting Maths

Algebra Puzzle

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Masuma Parvin:
Solve the following:

ABCD × D = DCBA

The Solution . . .
1089 × 9=9801

msu_math:
Very interesting !! But I think this solution is not so obvious because the relation "ABCD x D = DCBA" leads an equation of the form "(1000A + 100B + 10C + D) x D = 1000D + 100C + 10B + A"

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