book Maths Puzzle Numerical Ability

Mary is 20 years old. Her sister, Sara, is 5 years old. In how many years will Mary be twice as old as Sara?

Read Solution (Total 0)

book Other Question

how could i find "x" in this problem? 9/(x-3) - (x-4)/(x-3) = 1/4 My daughter is having problems with 2 step inequalities when it involves a fraction. Please help solve -x/5 + 2 >3. Thank you very much.