self Maths Puzzle Logical Reasoning Seating Arrangement

A sum of money placed at compound interest doubles itself in 5 years. It will amount to eight times itself at the same rate of interest in?

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self Other Question

2 persons A & B are rolling a die on the condition that the person who gets 3 will win the game. If A starts the game, then find the probabilities of A & B respectively to win the game?? A bag contains five balls,3 red and 2 white.balls are removed one at a time(without replacement) till all red balls are removed or all white balls are removed.What is the probability that the last ball removed is white?