To reach the Kaprekar constant (6174), your birth year undergoes repeated operations of forming the largest and smallest digits. Typically, it takes six to seven iterations for most four-digit numbers.
Class 6 Mathematics Chapter 3 Number Play question answer
Class 6 NCERT Ganita Prakash Chapter 3 Number Play
The Kaprekar constant is achieved by rearranging the digits of your birth year to form the largest and smallest numbers, then subtracting the smaller from the larger. Repeating this process typically takes six to seven iterations to reach 6174. For example, if your birth year is 1990, perform the steps systematically to see how many rounds it takes for your specific case.
For more NCERT Solutions for Class 6 Math Chapter 3 Number Play Extra Questions and Answer:
https://www.tiwariacademy.com/ncert-solutions-class-6-maths-ganita-prakash-chapter-3/