Level 1
Mandy bought 7 pens. Halim bought 5 times as many pens as Mandy. How many pens did Halim buy?

Level 3
Charlie bought $642 worth of staplers and pens. He bought thrice as many pens as staplers. He spent $334 more on pens than on staplers. Each stapler cost $1.60 more than each pen. Find the price of a stapler.

Level 3
Alfred had some peaches in 3 sizes. The number of medium peaches was twice the number of large peaches. The number of large peaches were three times the number of small peaches.
The price of each peach are as follows:
Small $4
Medium $7
Large $9

He sold all the small and medium peaches. He received $360 from selling ¹₃ of the large peaches.

1. How many large peaches did he have at first?
   
2. How much less did he collect from selling the small peaches than the medium peaches?

Level 1
Annie has 20 stickers and Geraldine has 5 times as many stickers as Annie. How many stickers do both of them have?

Level 3
Class A, B and C were given some chocolate bars to sell for their fundraising event. The average number of chocolate bars the 3 classes had at first was 225. After Class B sold twice as many chocolate bars as Class A and Class C sold ³₄ as many chocolate bars as Class B, the average number of chocolate bars the 3 classes had left was 45. How many chocolate bars did Class A and Class C sell altogether?