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Daily Challenges

January 2023
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Saturday, January 28, 2023

Who Won the Race?
Math and Logic

Who Won the Race?

We can sometimes use logic to stretch a little information a long way. Can these small clues tell us everything we need to know about who won this competition?

Series 3 of 3

Friday, January 27, 2023

The Nine Nine Plus
100 Day Challenge 2020

The Nine Nine Plus

There are lots of ways to add to nine, but is it possible to make it happen twice in this puzzle?

Thursday, January 26, 2023

How Much Can They See?
Math and Logic

How Much Can They See?

Art needs protecting and so art galleries need guards. How many does this one need?

Wednesday, January 25, 2023

Pasta, Pronto
Science and Engineering

Pasta, Pronto

"A watched pot never boils" is about psychology, not physics — how can we actually get water to boil sooner?

Series 3 of 4

Tuesday, January 24, 2023

Cool, Cooler, Coolest
Science and Engineering

Cool, Cooler, Coolest

Adding cold water to hot tea will help to cool it down. When should we do it?

Monday, January 23, 2023

Find the Pattern
Math and Logic

Find the Pattern

Mathematics is the art of reasoning about patterns, and not all patterns are numerical. What completes this pattern?

Sunday, January 22, 2023

Draw the Line
100 Day Challenge 2020

Draw the Line

Adding additional lines to a diagram can turn a challenging problem into something far simpler.