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Square Root Expression

Directions: Use the digits 1 to 9, at most one time each, to fill in the boxes to make the following expression as close to 0 as possible.



What are all the perfect square three digit numbers? Several of these can’t be used since they contain a repeated digit (e.g. 121 uses the digit 1 twice and 144 uses the digit 4 twice)



Using Perfect squares:
Sqrt(256) – sqrt(81) – sqrt(9) = 4

Using non-perfect squares:
Sqrt(145) – sqrt(92) – sqrt(6) = 0.00044178938368

Source: Erick Lee

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One comment

  1. Dang it.

    I got:
    √124 – √89 – √3 = -0.030503214

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