Self Maths Puzzle Numerical Ability

A two digit number is 18 less than the sum of the squares of its digits. How many such numbers are there?

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Self Other Question

If an examination 63% of the candidates in English,65% passed in Mathematics, and 27% failed in both subjects.What is the pass percentage?
(a)55%
(b)60%
(c)65%
(d)None.
A person spends 30% of his salary on house rent and 55% of the remaining money on food and clothes. He saves the remaining amount. If he saves ?59724 yearly, how much amount does he spend on food and clothes per month?