1) Start with 3524. What is the subtraction step after arranging digits descending and ascending? a) A) 5432 – 2345 b) C) 4523 – 3254 c) B) 3524 – 4523 d) D) 4325 – 5234 2) What is the result of 5432 – 2345? a) A) 6174 b) B) 3087 c) C) 4176 d) D) 8352 3) From 3087, what subtraction do we perform? a) A) 8730 – 0378 b) B) 8037 – 3708 c) C) 7830 – 3087 d) D) 7308 – 0837 4) What is the result of 8730 – 0378? a) A) 8352 b) B) 6174 c) C) 4176 d) D) 3524 5) Which of the following is known as Kaprekar’s Constant? a) A) 9999 b) B) 6174 c) c) 1234 d) D) 1000 6) Who discovered the constant 6174? a) A) Ramanujan b) B) Aryabhatta c) C) D. R. Kaprekar d) D) Pythagoras

kaprekar constant

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