Kaprekar's numbers

Who Came Up With Kaprekar's Numbers?
An Indian man named D. R. Kaprekar.

When & Where Was D. R. Kaprekar Born?
He was born January 17, 1905 in Dahanu, India.

When Were Kaprekar's Numbers Made?
It was made in 1949.

What Are Kaprekar's Numbers?
It's when you take 4 numbers and Arrange them descending minus ascending.

6174 is Kaprekar's Consonant, because once you solve th problem it it gives you the same numbers. So you'd be doing that same forever.

Example

• (6174) 7641-1467=6174
• (9032) 9320-0239=9081
• (5324) 5432-2345=3087
• (9925) 9952-2599=7353

Now You Try

• 9805-0589=
• 1000-0001=
• 9110-0119=
• Turn 3571 into a Kaprekar ploblem. Solve.
• Turn 2143 into a Kaprekar problem. Solve.

Dictionary

• Ascending-from lowest to highest
• Descending-from highest to lowest
• Dahanu- a city in India

Learn more at:

• www.wikipedia.org/wiki/6174_(number)
• www.cut-the-knot.org/Curriculum/Arithmethic/Kaprekar.shtml
• Ask your math teacher