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Number Puzzles Questions and Answers

Puzzles
73. What number should replace the question mark?
Ans: 2.
Sol.
So that each square block of four numbers totals 15.
 
74. What number should replace the question mark?
Ans: 3
Sol.
(3 × 9) – (6 × 4) = 3.
 
75. What number should replace the question mark?
100, 99.5, 98, 95.5, 92, 87.5, ?
Ans: 82.
Sol.
Deduct 0.5, 1.5, 2.5, 3.5, 4.5, 5.5