Numbers Puzzles

54. A statue is being carved by a sculptor. The original piece of marble weighed 250 kg. In the first week 30 per cent is cut away. In the second week 20 per cent of the remainder is cut away. In the third week the statue is completed when 25 percent of the remainder is cut away. What is the weight of the final statue?
Answer
105 kg
= 250 × 0.7 × 0.8 × 0.75.
55. Which is the odd number out?
9421, 7532, 9854, 8612, 6531, 8541
Answer
8612.
All the other numbers have their digits in descending order.
56. What is the factorial of 5?
a. 1
b. 120
c. 60
d. 25
e. 15
Answer
B.120.
120 (5 × 4 × 3 × 2 × 1).
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