What fractions can you find between the square roots of 65 and 67?

Find the polynomial p(x) with integer coefficients such that one solution of the equation p(x)=0 is $1+\sqrt 2+\sqrt 3$.

The squares of any 8 consecutive numbers can be arranged into two sets of four numbers with the same sum. True of false?

Equal temperament means $12$ times you scale up to be equivalent to an overall multiple of $2$

You want to go up seven points to go from C to G