Conjecturing With Kaprekar.

Jansson, Lars C.; Beardslee, Edward C.

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ERIC Number: EJ068731

Record Type: Journal

Publication Date: 1972

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Conjecturing With Kaprekar

Jansson, Lars C.; Beardslee, Edward C.

Mathematics Teaching, 61, 31-33, Dec 72

A proof is given that for any four digit number, repeated reordering of digits and subtraction will evenutally result in the number 6174. A computer program is included. (DT)

Descriptors: Computer Programs, Instruction, Mathematical Enrichment, Mathematics, Mathematics Education, Number Concepts, Numbers, Secondary School Mathematics

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