Class 7 NCERT • Ganita Prakash Maths Portal
Ch 06: Number Play
Select a topic or study module below to explore divisibility rules, prime and composite numbers, HCF and LCM, digit puzzles, cryptarithms, and Figure It Out solutions.
Topic 01 • Divisibility Rules
Digit Patterns for 2, 3, 4, 5, 8, 9, 10 & 11 & Why Sum-of-Digits Tests Work
Topic 02 • Primes & Composites
Sieve of Eratosthenes, Prime Factorisation Methods & Unique Properties of Numbers
Topic 03 • HCF & LCM
Finding HCF and LCM via Prime Factorisation & Real-World Periodic Word Problems
Topic 04 • Digit Puzzles
Magic Squares, Palindromic Numbers, Reverse-and-Add Patterns & 2-Digit Number Tricks
Topic 05 • Cryptarithms
Solving Alphabetic Addition and Multiplication Puzzles Using Logical Digit Constraints
Module 06 • Figure It Out & HOTS