self Maths Puzzle

A two-digit number is three less than seven times the sum of its digits. If the digits are reversed, the new number is 18 less than the original number. What is the original number?

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self Other Question

Replace alphabets by numbers for following arithmetic equations.

G E R A L D
D O N A L D +
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R O B E R T

Solve this!!
arrange 25 integers from 10 to 35 with out repetation in a 5*5 size squar box (total 25 small boxs) in such a manner that sum of 5 integers (s) of 5 horizontal, 5 vertical and 2 diagnonals lines are same .S will be