Question

Riddle: Sonja discovered 2/5 of the pens she bought were not working. She also noticed 1/4 of the working pens were red. If 36 of the working pens were red, how many pens did Sonja buy?

Answer 1

240 pens

Explanation:

36*4=144

144/3=48

48=1/5 of pens

48*5=240