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Is it right-angled

A triangle has sides of length 7 cm, 24 cm, and 25 cm. Is this a right-angled triangle?

Fill in the blanks

Look at this sequence of numbers: 4, 9, 16, 25, ___, 49 What number should go in the blank?

What is the number

A number is tripled, then 7 is subtracted from the result. The final answer is double the original number plus 5. What is the number?

What is the angle

In triangle ABC, angle A measures 40°, and angle B measures 65°. What is the size of angle C?

Mystery number puzzle

I think of a number. I double it, then subtract 7. The result is 25. What was my original number?

How many apples?

Emma had some apples. She gave 1/3 of them to her friend Lucy and then ate 5 apples herself. After that, she had 16 apples left. How many apples did Emma have at the beginning?

Missing Number Mysteries

A sequence of numbers goes like this: 3, 7, 11, 15, ___, 23, 27 What number should go in the blank?