Is the sum of any two consecutive prime number is also prime ?

If you are just building your payment history, how many points from a perfect score will you possibly miss?

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?

The vertices of a triangle are a(7.5), b(4,2), and c19. 2). what is