Question 5 - Page 143 - Digits in Disguise - Chapter 6 Class 7 - Number Play - Ganita Prakash

Last updated at October 17, 2025 by

[Number Play Class 7] Solve this cryptarithm: C1 + C = 1FF - Digits in Disguise

part 2 - Question 5 - Page 143 - Digits in Disguise - Chapter 6 Class 7 - Number Play - Ganita Prakash - Class 7 (Ganita Prakash 1, 2 & old NCERT)

Remove Ads Share on WhatsApp

Transcript

Question 5 - Page 143 Solve this cryptarithm: Here, Adding a 2-digit number to a 1-digit number and getting a 3- digit number that starts with 1. This means C1 must be a number in the 90s. Therefore, C must be 9. Let’s try For C = 9 91 + 9 = 100 Now, 100 = 1FF Thus, C = 9, F = 0

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 15 years. He provides courses for Maths, Science and Computer Science at Teachoo