Question

Find the missing number, if same rule is followed in all 3 pattern-
18,15,11
30,27,19
45,39,?

Answer 1

The value of missing number is 28.

Step-by-step explanation:

We have,

18    15    11

30   27   19

45   39    ?

To find, the missing number = ?

The pattern follow row-wise,

$\dfrac{First term+Second term}{3}$.

In first row,

$11=\dfrac{15+18}{3}=\dfrac{33}{3}=11$

In second row,

$19=\dfrac{30+27}{3}=\dfrac{57}{3}=19$

Similarly,

In second row,

$?=\dfrac{45+39}{3}=\dfrac{84}{3}=28$

Hence, the value of missing number is 28.