Place value clues
Students use digit and range clues to narrow down the mystery number.
Free maths practice app
Number riddles practice app
A quick classroom-ready app for solving number detective clues with place value, doubles, halves, operations and number properties.
Doubles and halves
Clues ask students to reverse double and half relationships before checking the number.
Operations clues
Students undo operations and use range clues to test whether the number fits.
Properties clues
Odd, even, prime, composite and multiple clues help students reason through possible answers.
What students practise
The app gives students short clue-based riddles where they need to combine more than one piece of number information before answering.
- reading each clue before choosing a mystery number
- using place value and range clues
- using doubles and halves to work backwards
- undoing operation clues
- checking odd, even, prime, composite and multiple clues
How it fits a lesson
Use it after modelling how to eliminate impossible answers, during rotations, as a number-reasoning warm-up, or as follow-up practice when students need more examples.
- start with place value clues when students are learning how to organise information
- use doubles and halves when students need inverse-thinking practice
- use operations when students can work backwards from a clue
- use properties or mixed practice when students are ready to combine several kinds of reasoning
Why it helps
Number riddles make students slow down, compare clues and justify a possible answer instead of only applying one procedure.
- builds careful mathematical reading
- connects place value, operations and number properties
- supports reasoning by narrowing the set of possible numbers
Frequently Asked Questions
Is the number riddles app free?
Yes. Students, teachers and families can open the number riddles app in a browser for free.
What kinds of riddles are included?
The app includes place value, doubles and halves, operations, number properties and mixed clue-based riddles.
Can teachers choose the difficulty?
Yes. Easy, standard and challenge levels adjust the number range, and teachers can choose one clue family or mixed practice.
Does it help with reasoning, not just answers?
Yes. The riddles ask students to read several clues, narrow the possible numbers and check the final answer against each clue.