exam Maths Puzzle Numerical Ability

There are 3 red and 7 black marbles in a bag. If I am blindfolded, how many times must I reach in and pull out a marble before I am sure it is a black one?

Read Solution (Total 0)

exam Other Question

The points (5,2), (2,6), and (-8,-3) are three vertices of a parallelogram. Locate and give the coordinates of a fourth vertex. Find all possible solutions. I need help with this problem. Thank you for your help!

Solve (h=16t^2 + vt + s) for t