Question

Medals to anyone who solves
Which set of numbers does not create a triangle?
115 cm, 65 cm, 1.5 m

5 m, 9 m, 1500 cm

12.5 ft, 3 yd, 19.75 ft

6 yd, 33 ft, 15 yd

Answer 1

You want these to be true:
a+b>c
a+c>b
b+c>a

so if you test that for each set of numbers and find one that does not fit you will have your answer.

Answer 2

so it is the first one

Answer 3

yes :)

Answer 4

but the second one doesnt work either

Answer 5

make sure you are looking at the feet and yards an the meters and centimeters try simplifying them all to the same unit of measure.