practice is usually helpful to progress, especially if it is distributed

Friday, 5 August 2016

subtraction of integers




question (ii) is the 3-digit version of DR Kaprekar's 4-digit constant

the 4-digit version should take at most 7 steps (iterations) to reach the constant

question (iii) is Aditya's constant, who was studying variations of Kaprekar's constant to discover this (when she was 14 years old)

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