exam
Maths Puzzle
Numerical Ability
Mark is 3 years older than Jane. In 4 years, Mark will be 1.5 times as old as Jane. How old is Mark now?
Read Solution (Total 0)
exam Other Question
16-20 EVEN DIRECTIONS:
FIND THE DISCRIMINANTOF THE QUADRATIC EQUATION, PUT IT IN STANDARD FORM!
16) 5X^2+3X=12
18)7-5X^2+9X=x
20)2x-x^2=x
A water wheel has a 10ft radius. To get a good approximation of the speed of the river, you count the revolutions of the wheel and find that it makes 14 revolutions per minute (rpm). What is the speed of the river?