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A number between 10 and 100 is five times the sum of its digits. If 9 is added to it the digits are reversed. What is the number?

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Interesting fact:

Nikola Tesla, the brilliant scientist and father of alternating current (AC), was born during a massive lightning storm in Smiljan, Serbia in 1856. The midwife believed it was a bad omen, but Tesla’s mother disagreed, allegedly saying that her son would be a child of light. How apt!