Level 2
Clara and Dan saved a fixed amount of money every day. Dan saved $1.50 more than Clara each day. After several days, Dan saved $40 and Clara saved $25. Find the amount that Dan saved every day.
Level 3 There are 634 passengers in Train A. There are twice as many passengers in Train B as in Train A. There are half as many passengers in Train C as in Train A.
How many passengers are there in Train B?
How many passengers are there in the 3 trains altogether?