Question

20, 20, 19, 16, 17, 13, 14, 11, ?, ?

• A. 10, 10
• B. 10, 11
• C. 13, 14
• D. 13, 16

Answer 1

The correct option is A 10, 10

Let the missing terms of the series be $x_1$ and $x_2$.
Thus, the sequence 20, 20, 19, 16, 17, 13, 14, 11, xv x2 is a combination of two series :
I. 20, 19, 17, 14, $x_1$ and II. 20, 16, 13, 11, $x_2$
The pattern in I is - 1, - 2, - 3,......So, missing term, $x_1$ = 14 - 4 = 10.
The pattern in II is - 4, - 3, - 2,......So, missing term, $x_2$ = 11 - 1 = 10.