A number x is said to be the harmonic mean of y and z if 1/x is the average of 1/y and 1/z.

Q1 which of the following is a factor of a)37 b)53 c)62 d)82 q2) if the sum of 2016 different whole numbers is odd. at most how many of the numbers can be even a)0 b)1 c)2014 d)2015

Which of the following can be used to explain a statement in a geometric proof?

What 620000 divided by 10 to the third power