Question

Which of the following alternatives will replaces the question mark in the given series?

$19200,1920,240,40,10$ ?

• A. $1$
• B. $0$
• C. $5$
• D. $10$

Answer 1

Answer: (C)

$5$

$19200,1920,240,40,\mathrm{10.....}$
Divide first by second, second by third, third by fourth, and so on...

We get
$10,8,6,4,......$
So the next number $x$ should satisfy $\frac{10}{x}=2$
$\therefore x=5$

Hence, option C.