Weekly Brain Teaser

brainteaser

Every week we feature a Brain Teaser or a thought-provoking question.

If you have one that you would like to share with fellow engineers, please email it to info@engineeringdaily.net.

This week’s brain teaser

Solve the following with the conditions given:

DA – BC = BD

a) All the numbers used A, B, C and D are prime

b) The answer BD is also a prime number

c) The numbers DA and BC are not prime

d) Also the number A < C

Find the numbers A, B, C and D

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