Timdle Math

About Timdle Math

Timdle Math is a daily mental math puzzle from Timdle, the site best known for its timeline game. Instead of historical events, the cards carry math expressions: powers, square roots, fractions and sums that test your order of operations.

Each day you get nine expressions. One is already on the line to start, with its value shown. The next card appears below, and you drag it onto the line or tap the circle on the smaller or larger side to place it. You keep placing cards one at a time until all eight remaining expressions are slotted in from smallest to largest.

You are not asked for exact answers. The puzzle is about number sense, such as whether the square root of 10 is bigger than pi, or where a fraction sits next to a small power. A new set appears at midnight in your own time zone.

It takes a couple of minutes, which makes it a quick warm-up for students, teachers and anyone who likes estimating. Timdle also runs other daily sorting games, including the original timeline and a music edition.

How to play Timdle Math

1. Open Timdle Math and look at the starting expression on the line.
2. Read the expression on the next card.
3. Drag it onto the line, or tap the circle on the smaller or larger side, to place it.
4. Repeat for each new card until all nine expressions are in order from smallest to largest.

Tips

• Round roots to the nearest perfect square: the square root of 692 is a little over 26.
• Turn fractions into rough decimals before comparing them with whole numbers.
• Do the multiplication before the addition when an expression mixes them.

Questions