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Maths Puzzles Questions for Kids

13. 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
Sol.
lb : reverse the calculations:
So 48.75 ÷ 0.75 = 65,
65 ÷ 0.8 = 81.25 and
81.25 ÷ 0.65 = 125.
 
14. On taking delivery of a consignment of eggs the market stall owner was furious to find that several were cracked. In fact, on counting them up in order to assess the damage he found that 72 were cracked, which was 12 percent of the total consignment. How many eggs in total were in the consignment?
ANS: 600
Sol.
72 ÷ 12 × 100 = 600.
 
 
15. In 19 years time the combined ages of my three brothers will be 94. What will it be in nine years time?
Ans: 82
Sol.
Combined age in 9 years time will 94 – (3 x (13 – 9))
94 – 12 = 82.