Madhya Pradesh Police Exam Model Paper 5

The pattern follows here is:Each term is decreased as a difference between them in a multiple of 3.
62 = First Term - 3
$62=65-3$
$62=62$
Now,
56 = Second Term - 6
$56=62-6$
$56=56$
Now,
47 = Third Term - 9
$47=56-9$
$47=47$
Now,
35 = Fourth Term - 12
35 = 47 - 12
35 = 35
Similarly,
x = Fifth Term - 15
$\mathit{x}=35-15$
x = 20.
Hence, the correct answer is "20".