book Maths Puzzle Numerical Ability

The square of 9 more than a number is equal to 9 more than the square of the number. What is the number?
thanx

Read Solution (Total 0)

book Other Question

I cannot figure out the solution to what number makes the absolute value of x equal to the negative absolute value of x?
Please help. simplify 35 divided by 5 plus 2 times 7