Today, I have MASMO( Malaysia ASEAN Scholarship Maths Olympiad). Its a mathematics competition, hard but fun for me( I love maths, especially olympiad ones). Actually, the question are STD. 6 maths olympiad, and I have about one year haven't touch maths olympiad, only join last year MASMO competition but quite easy, so, I don't call it 'maths olympiad' , just 'maths'.
Here is an example:
Here is an example:
3! means 3*2*1, 4! means 4*3*2*1. x is the greatest prime factor of 5!+7!. What is x?
I thought the answer is just 5, but when I use calculator, I was wrong! The answer is 43!
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