[1]
D. P. K. Bhattacharjee, “Kaprekar’s Constant 6174 for Four Digits Number Reality to Other Digits Number”, ijcmp, vol. 4, no. 5, Sep. 2020, Accessed: Jul. 22, 2024. [Online]. Available: https://journal-repository.com/index.php/ijcmp/article/view/3389