exam
Maths Puzzle
Numerical Ability
4^x-3 = 8
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exam Other Question
Simplify:
((3x(^2)y)^2)/ (9^-1)(x^-4y^6)^-2
There are 4 red, 4 white, 4 blue and 4 yellow balls in a bag (a total of 16 balls). They are picked at random. How many times you have to pick the balls (one at a time) so that you have at least one ball of each color in your hand?
Thank you.