1.1 There are buses driving around a circular route. They are located at an equal distance from each other. There are 2 buses, and they run at 15-minute intervals. The question: If we add another bus, what will the new interval be? Note that the buses always drive at the same speed.

1.2 The kangaroo can jump either 6 m or 8 m along a straight line. The question is whether the kangaroo can reach a point at a certain distance from the starting point. The distances: a) 1.5m b) 7m c) 4m.

1.3 George put bolts in one box, screws in another box, and nuts in a third. He labeled each box, but unfortunately, all the labels got mixed up — none of them matches the actual contents. Now, your task is to figure out, by opening just one box, where each type of hardware (bolts, screws, and nuts) is located.

1.4 Andrew loves weighing his toys on a scale! He found that one ball and two blocks balanced a car on the scale.  Two balls balanced a car with one block on the scale. How many blocks by themselves would it take to balance the car? Remember: All the blocks weigh the same, and all the balls weigh the same!

1.5 Billy has 7 potatoes. Peter has 5 potatoes. Joe has no potatoes. The boys cook the potatoes and divide them equally between one another. In turn, Joe, grateful because the boys shared their potatoes with him, gives Billy and Peter 12 candies. The question: How should Billy and Peter divide the candies fairly between each other?

1.6 Imagine you’re taking shots at a target (on the right), trying to score exactly 100 points. To solve this, let’s think about how we can combine different scores to reach 100 points.