exam
Maths Puzzle
Numerical Ability
Tom can do a job in 3 hours, Dick in 4 hours, and Harry in 6 hours. If they do it together (and do not delay each other), how long does the job take?
Read Solution (Total 0)
exam Other Question
If $4000 is invested at 6%, how much must be invested at 3% so that the total annual income will be $270?
please graph the ellipse x^2 + 4y^2 = 64