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Number Puzzles Questions and Answers

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28. How many lines appear below?
Ans: 10.
Sol.
10
 
29. Complete this sequence?
2 3 4 9 16 81 256
Ans: 6561.
Sol.
There are two sequences arranged alternately. In each sequence the number is the square of the previous number in that sequence. 6,561 is the square of 81.
 
30. What comes next?
Ans: – 11.76.
Sol.
×1, ×2, ×3, ×4