Question: For Roger's phone to function optimally, he can have a maximum of 50 apps on his phone. However, the recommended number of apps is 35. If Roger has twice the recommended number of apps, how many apps must he delete for his phone to function optimally again?
Answer with step-by-step thinking: Roger has 35 x 2 = 70 apps on his phone. He needs to delete 70 - 50 = 20 apps.
So the answer is 20.

Question: James takes 2 Tylenol tablets that are 375 mg each, every 6 hours. How many mg does he take a day?
Answer with step-by-step thinking: Each dose is 375 * 2 = 750 mg. He takes it 24 / 6 = 4 times. So he takes 750 * 4 = 3000 mg a day.
So the answer is 3000.

Question: Cassy packs 12 jars of jam in 10 boxes while she packs 10 jars of jam in 30 boxes. If she has 500 jars of jams, how many jars of jam will she have left when all the boxes are full?
Answer with step-by-step thinking:
Cassy can pack 12 x 10 = 120 jars of jam in the 10 boxes. She can also pack 10 x 30 = 300 jars of jam in the 30 boxes. A total of 300 + 120 = 420 jars of jam can be packed in the boxes. So, 500 - 420 = 80 jars of jam will be left unpacked.
So the answer is 80.