Level 2
Alicia spent 3 days making paper frogs for her friends. Each day she managed to make 4 more paper frogs than the day before. She made a total of 36 paper frogs. How many paper frogs did she make on the first day?
Level 2
Katherine read a book from Monday to Wednesday. Every day, she read 10 more pages than the day before. She read 84 pages on Wednesday. How many pages of the book did Katherine read from Monday to Wednesday altogether?
Level 3
There are some lamp posts along a road at equal distances.
The distance between the 1st and the 4th lamp post is 12 m.
What is the distance between the 1st and the 10th lamp post?