reasoning Maths Puzzle Numerical Ability Ratio and Proportion

2/3 of people read newspaper A , 3/4 read newspaper B.if 38 read both and 8 didn’t read any of the 2.how many read A?

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reasoning Other Question

Four persons can cross a bridge in 3, 7, 13, 17 minutes. Only two can cross at a time. Find the minimum time taken by the four to cross the bridge. You are shown five cards lying on a table (so you can only see one side of each of the five cards). Each card has a single positive integer printed on each side of the card (they may or may not be repeated). The numbers that you can see are: 1, 2, 3, 4, and 5. How many cards must you turn over to completely verify the statement any card that has a 2 on one side has a 5 on the opposite side ?