State the Rate

State the Rate tests how well you judge proportions. A note beside each object gives a target percentage, and you line that number up with what you think the item should hold. The set changes from round to round, using things like syringes, batteries, and other everyday devices. Estimating the fill level is the whole challenge, pushing your number sense and quick judgment at the same time.

How to play?

Drag the fill level on each item to match the percentage written on the paper beside it. Some objects have long, narrow chambers, so a small movement changes the amount fast. Others spread their space differently, making the same percentage look lower or higher. Set your estimate, submit it, and move on to the next object.