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Algebra Level 3

A four digit number Get reversed when multiplied by 4. Find the number.


The answer is 2178.

Rohit Ranjan by Rohit Ranjan , 31, India

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2 solutions

Here is my solution, :D

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for A the possibility for it being 1 is ruled out because we can't get 1 on the unit place when multiplying a no. by 4.

Afreen Sheikh - 6 years, 4 months ago
David Holcer
Mar 22, 2015 
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for i in range(10**3,10**4+1):
    i=str(i)
    num=int(i[::-1])
    if int(i)*4==num:
        print i

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