Question 2 = (1/2-1/3)+(1/3-1/4)+(1/5)+(1/5)

Question 3 = (1-1/2-1/4-1/8-1/6-1/32). 16- 1/ 16)+ 1/32=( 1- 1/2- 1/4- 1/8- 1/8)+ 1/32=( 1- 1/2- 1/4- 1/4)+ 1/32= 1/32

Question 4 =19/99x (1+2+3+4+10) =19/99x (1/x 5) =/kloc-.