Jen loves to complete the crossword puzzles in the newspaper.
Each day, Jen records how long it takes to complete the crossword.
On Friday, she took 50% less time than on Thursday.
On Saturday, she took 20% less time than on Friday.
On Saturday, she took 36 minutes to complete the crossword.
How many minutes did it take Jen to complete the crossword on Thursday?
Answer:
Let:
T = time taken on Thursday
S = time taken on Saturday
T x 0.5 x 0.8 = 36 minutes
T = 90 minutes