Maths Olympiad Exam

Q. In a bag there are 13 red, 5 blue, 1 white and 9 green balls. Without looking into the bag determine the least No of balls that can be drawn such that three of them are of same colour

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Maths Olympiad Other Question

Q. Find for how many positive integers n with n Q. Determine how many positive integers less than 400 can be created using only the digits 1,2 or 3 with repetition of digits allowed