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Puzzles Questions and Answers

Puzzles
41. What number should logically replace the question mark?
Ans: 26.
Sol.
Starting at 10 and moving three segments clockwise yields the series 10, 11, 14, 19, ?, 35. The difference between terms in the series is the sequence of odd numbers 1, 3, 5, 7, 9, 11.
 
 
42. If five men can build a house in 16 days, how long will it take just two men to build the same house, assuming all men work at the same rate?
Ans: 40 days.
Sol.
Five men take 5 × 16 = 80 man days to build the house.
Two men will, therefore 40 days to build the house (80÷2) = 40 days.