Missing Numbers

Mystery Number Detective

Put on your detective hat! Solve addition and subtraction mysteries by finding the missing number.

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Case: 1 of 10
NUMBER MYSTERY

Can You Find the Missing Number?

Look carefully at the equation and work out what belongs in the question-mark box.

4 + ? = 9

Detective Clue

What number completes the equation?

Choose the Mystery Number

Select the number that makes the equation correct.

Great detectives take their time. Every attempt helps you learn!

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