Question 9

# Which number will replace the question mark (?) in the following series?7, 11, 18, 29, ?, 76

Solution

$$7\times\ 2-3=11$$

$$11\times\ 2-4=18$$

$$18\times\ 2\ -\ 7=29$$

$$29\times\ 2-11=47$$

$$47\times\ 2\ -\ 18=76$$

Here option 'A' is correct.

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