16.
What will come at the place of question mark ?
2, 3, 6, 15, ?, 123

17.
In the following number series a wrong number is given. Find out the wrong number.

1, 3, 10, 21, 64, 129, 356, 777

18.
What will come at the place of question mark ?
9, 27, 31, 155, 161, 1127, ?

19.
What will come at the place of question mark ?
2, 7, 27, 107, 427, ?

20.
Sunday, Monday, Wednesday, Saturday, Wednesday, Monday, .....

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