self Maths Puzzle General Ability General Knowledge

199
∑
n=1
(n) is written on cards. What is the probability of drawing a card with an even number written on it?

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self Other Question

There are three similar boxes, containing

(i). 6 black and 4 white balls
(ii). 3 black and 7 white balls
(iii). 5 black and 5 white balls, respectively.

If you choose one of the three boxes at random and from that particular box picks up a ball at random, and find that to be black, what is the probability that the ball picked up from the second box The remainder is 57 when a number is divided by 10,000. What is the remainder when the same number is divided by 1,000?