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A Kaprekar number is a number whose square can be split into two parts whose sum is the the original number. Both parts must be positive.For example, 55^2 = 3025 and 30+25 = 55.This is an example in base 10. Kaprekar also defined his number for other bases.
297 is 33% of 900
1/99 = 0.01 01 01 .. .. 99 is a Kaprekar number (as is any string of 9s) : 992 = 9801 and 98 + 01 = 99
1254 - 297 = 957/2 = 478.5
27 x 11 = 297 The number is 297.