Level 3
Cathy had twice the number of toy bricks as Jenson. Cathy used all her bricks to build 7 identical houses. Jenson used all his bricks to build 5 identical houses. Cathy used 9 more bricks than Jenson for each house. How many bricks did Jenson have?
Level 3 Rael bought some notebooks at $3 each. He later sold them to his customers at $8 each. For customers who bought two notebooks were given another notebook for free. The customers bought either one or two notebooks. Rael gave away 110 free notebooks and collected a total of $1320 more than what he had paid for. How many customers bought just one notebook?
