Tom delivers newspapers every morning. Today he did the following:
Delivered 10 newspapers on Flinders Street
Delivered 6 newspapers on Collins Street
Picked up 20 newspapers from the newsagent
Delivered 15 newspapers on Lonsdale Street
When Tom returned home there were eight newspapers in his bag.
How many did Tom start with?

explanation:

step-by-step explanation:

it is 10.6 according to my calculations

the diagram shows you   triangle def with de=4, df=9 and de≠df≠ef.

the sum of the lengths of two triangles' sides are always greater than the length of the third side:

substitute sides lengths:

then 5< ef< 13 (option 3 is true).

def is a scalene triangle with all sides of different lengths (option 5 is true, option 2 is false).

answer: correct choices are 1, 3 and 5