If 16 : X :: X: 196, find the positive value of x?

Directions: Find the wrong number in the following number series:

2, 6, 10, 19, 36, 69, 134

Find the wrong number in the series-

2880, 480, 92, 24, 8, 4, 4

Which of the following numbers will replace the question mark (?) in the given series?

27, 29, ?, 182, 730, 3652

Which of the following n umbers will replace the question mark (?) in the given series?
 78, 112, 64, ?, 50, 140 

Select the number from among the given options that can replace the question mark (?) in the following series.
 34, 102, 612, 5508, ? 

Which of the following numbers will replace the question mark (?) in the given series?
 10, 20 , 23, ?, 97, 582

Which of the following options is divisible by 11?