RRB NTPC · Classifying Basic Numbers

Exercise and reference answers

Matching pairs

1. Left

   Smallest prime number

   Right

   2

2. Left

   First composite number

   Right

   4

3. Left

   Prime factors of 253

   Right

   11 x 23

4. Left

   Circle circumference / diameter

   Right

   Pi

Instructions

Match each number concept to its value