AP Police SI Mains 2019 Arithmetic and Reasoning

Instructions

A sequence of numbers or alphabets following a specific pattern is given. Fill in the blanks with suitable entry from the options that follows the same pattern.

Question 133

1, 4, 10, 20, .........

Solution

f(n)$$=\frac{n\left(n+1\right)\left(n+2\right)}{6}.$$

So,$$f(1)=1$$

$$f(2)=4$$

$$f(3)=10$$

$$f(4)=20$$

$$f(5)=35$$

So,B is correct choice.

Share on Whatsapp Share on Whatsapp

Create a FREE account and get:

  • Download Maths Shortcuts PDF
  • Get 300+ previous papers with solutions PDF
  • 500+ Online Tests for Free

cracku

Boost your Prep!

Download App