Megan has three candles of the same length to provide light. Candle a burns for exactly 72 minutes. Candle b burns twice as fast as candle a . Candle c burns
three times as fast as candle b . What is the greatest total number of minutes of light
that all three candles can provide?

pay attention in your classes and concentrate the best thing you can do to raise your test scores is to pay attention when you're supposed to be learning the material: in class!

take good notes.

do your homework.

use mnemonics and other tricks.

do practice tests.

note: the best i know.