which number is between 6 1/8 and square root of 64

\(6\frac 1 8 < 7 < 8=\sqrt{64}\)

The answer really depends on your defintion of "number"

If you mean whole number, the answer is 7.

If you mean any sort of number, the answer is: there are an infinite number of numbers.

7 1/16 or 7.0625

\(\(this\ number\in\{\mathbb R|\ 6\frac{1}{8} \)

Latex does not work again.

this number ∈ { ℝ| 6 1/8 < this number < 8}

!