book Maths Puzzle Numerical Ability

I need help with these two problems please help me.

The Greater of two consecutive integers is 15 more than twice the smaller. Find the integers.

Read Solution (Total 0)

book Other Question

I am unable to solve this problem. Kindly help.

Log10(x+y)/3 = 1/2(log10x + log10y) Now, prove that x/y + y/x = 7 Find the roots of the quadratic equations by the method of completing the square. Express the roots, if they are not rational, in simplest radical form.