Question 3 - Figure it out - Page 10, 11 - Chapter 1 Class 8 - A Square and a Cube (Ganita Prakash)

Last updated at August 12, 2026 by

[Class 8 Maths] Given 125^2 = 15625, what is the value of 126^2? - Figure it out - Page 10, 11

part 2 - Question 3 - Figure it out - Page 10, 11 - Chapter 1 Class 8 - A Square and a Cube (Ganita Prakash) - Class 8 (Ganita Prakash - 1, 2 & Old NCERT)

Remove Ads
Teachoo · Class 8 Explore Class 8

Transcript

Question 3 Given 1252 = 15625, what is the value of 1262? (i) 15625 + 126 (ii) 15625 + 262 (iii) 15625 + 253 (iv) 15625 + 251 (v) 15625 + 512 To find 1262, we must add the 126th consecutive odd number to 1252. Finding 126th odd number The 1st odd number is 1, 2nd odd number is 3, 3rd number is 5, …, 6th odd number is 11 and so on. Thus, nth odd number would be 2n – 1 And, 126th odd number is 2(126) − 1 = 72 − 1 = 251 Calculating 1262 1262 = 1252 + 251 = 15625 + 251 So, option (iv) is correct

CA Maninder Singh's photo - Co-founder, Teachoo

Made by

CA Maninder Singh

CA Maninder Singh is a Chartered Accountant with 16+ years of practical experience and 20+ years of teaching experience. At Teachoo, he simplifies Accounts, Tax and GST with step-by-step examples so students can apply concepts confidently in exams and real life.

For an uninterrupted learning experience, students can use Teachoo Black to remove ads and focus better.