What belongs together?
Loading…
What you will learn
By the end, you can sort things by a rule, spot the odd one out and use two rules at once.
Fatou’s secret club plays a sorting game. The rule is hidden, and members test it with objects: a ball goes in, a coin goes in, a book stays out. Ben spots it first: everything that goes in is round! Sorting is finding the rule and checking every item against it.
Read the explanation
A rule is a property that things share: round, blue, has four legs, is an even number. To sort, take one item at a time and ask: does it follow the rule? The odd one out is the item that breaks the rule all the others follow. Some sorting uses two rules at the same time, like “blue AND a triangle”. Then an item must pass both tests to belong.
- A rule is a property: colour, shape, size, number of sides…
- Test every item against the rule, one at a time.
- Two rules at once: the item must pass both tests.