book Maths Puzzle Numerical Ability

1. A designer, attempting to arrange the characters of his artwork in the form of a square grid with equal number of rows and columns, found that 24 characters were left out.

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Hi! i'm stuck on this problem. Radical and fractional exponents
(3{{{SQRT}}2- 2{{{sqrt}}}3) ^3.

thanks solve

One number is 4 times another.The sum of the numbers is 65. Find the numbers