NDA 2016 Maths · Mathematics · Sequences and Series · easy

The number of multiples of 6 lying between 100 and 500 is

Single correct option

The number of multiples of

6

lying between

100

and

500

Show answer and solution

Answer: (B) $67$

The first multiple above 100 is

102

and the last below 500 is

498

. They form an AP with

d=6

, so

n=\dfrac{498-102}{6}+1=66+1=67

. Dividing

400

6

gives about

66.7

, and the usual error is to forget to add

1

for the first term.

Original question written in the NDA 2016 Maths pattern and checked twice for the correct answer. Not an official question paper. How we write and check questions · Corrections policy · Report a mistake