Tech Mahindra Number Series Quiz

The difference between two consecutive numbers are 2,4,8,16 . Each time the difference is doubled.
So next number will be increased by 16* 2=32

7 x 5 =35 , 35 x 4=140 , 140 x 3=420 , 420 x 2= 840. The multipliers are in the decreasing order 5,4,3,2.
So the next number is 840 x 1 =840.

Each next number of the given series is increasing in the order of 4,6,8,10,12. The missing number will be obtained by adding 14 to 43 . 43 + 14 =57

5 x 3+1 =16 , 16 x 3 +3 =51 , 51 x 3 +5=158.
Therefore the next numbers is 158 x 3 + 7 =481

Explanation :
The differences are 18,36,54,72 which are consecutive multiples of 18. The next number will be obtained by adding the next multiple of 18 , that is 90 to 181 .
So the answer is 271

The given numbers in the series are based on logic of 22 -1 , 42 -1,62 -1,82 -1, 102 -1 and 122 -1.Thus even consecutive numbers are squared then 1 is subtracted .
The next number will be 142 -1 =195

10, 22, 38, 58, 82
+12 +16 +20 +24
The difference between two consecutive numbers is increasing by 4.
The series can be completed by adding 24+4 =28 to 82.
The answer is 110.

The logic here is (13 -1), (23 -1), (33 -1), (43 -1), (53 -1) and (63 -1),
The answer is 215