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Number Puzzles Questions and Answers

Puzzles
67. What are A, B, C, and D?
Ans: A is 4; B is 20; C is 5; D is 2.
Sol.
Add the numbers from top to bottom diagonally to the left of the bottom line for the first three positions on the bottom line, and to the right for the next three positions.
 
68. What comes next?
Ans: 5
Sol.
The numbers are the alphabetical positions of the letters spelling FACADE.
6 – F;
1 – A;
3 – C;
1 – A;
4 – D;
5 – E;
 
69. What number should replace the question mark?
52, 25, 77, 77, ?, 451, 605
Ans: 154
Sol.
Reverse the previous number and add; for example 52 reversed is 25 and 52 + 25 = 77.