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Puzzles Questions and Answers

37. A marble statue is being carved by a sculptor. In the first week 35% is cut away, in the second week 20% of the remainder is cut away and in the third week 25% of the remainder is cut away and polished to produce the final statue. The weight of the final statue is 48.75 lbs. What was the weight of the original piece of marble?
Ans: 125 lb.
Sol.
Reverse the calculations;
so 48.75÷0.75 = 65
65÷0.8 = 81.25
81.25÷0.65 = 125.
 
 
38. Which number is logically replace the question mark?
Ans: 64.
Sol.
The bottom number is the top right number times the square root of the top left number.