Negative Exponents – Closest to Zero

Directions: Using the digits 0 to 9, at most one time each, fill in the boxes to make a result that is as close to zero as possible.

Hint

What happens when you have a negative exponent?
Where does the 1 go?

Answer

8 ^ (-2) = 1 / 64

Source: Daniel Luevanos

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6 comments

  1. How can you use the 4 in two places in the equation? If that’s allowed, then 2 ^ -6 = 1/64 should also be allowed.

  2. So, it seems 7^-2 = 1/49 and 8^-2 = 1/64 are the only solutions which use unique digits, with the latter being closer to zero.

  3. Any two-digit number at power -1

    32^(-1) = 1/32
    26^(-1) = 1/26

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