Learn English > English lessons and exercises > English test #130728: Maths riddles
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Maths riddles

In this activity, you will read short clues written in English and try to find the correct number.
Each sentence describes a number using words like double, half, more than, or between.

To succeed, you need to understand the vocabulary of basic math operations and number positions.

This activity will help you:

Practice reading in English

Improve your understanding of numbers

Use logic and mental maths

Write your answers as numbers (not in words).

Ready? Let's go!

1. Maths vocabulary:

English	Examples
plus	twenty plus ten = thirty
minus	ninety minus five = eighty-five
multiplied by	seven multiplied by six = forty-two
times	ten times three = thirty
divided by	twenty divided by four = five
half	half of one hundred = fifty
double	double twenty = forty
quarter	a quarter of one hundred = twenty-five

2. Comparisons:

English	Examples
more than	ten more than twenty = thirty
less than	five less than seventy = sixty-five
before	The number before forty = thirty-nine
after	The number after thirty-nine = forty
between X and Y	Between twenty and twenty-two = twenty-one

3. Useful:

English	Examples
the sum of	The sum of 40 and 20 = sixty
the product of	The product of 5 and 6 = thirty
comes after / comes before	Seventy-eight comes before seventy-nine
units / tens / hundreds

Write your answers as numbers (not in words). All the answers are explained.

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1. It's the number after thirty-nine and before forty-one.

2. It's double twenty.

3. It's the sum of fifty and twenty.

4. It's half of one hundred.

5. It's ten less than ninety.

6. I come between seventy-eight and eighty.

7. I am the result of ten multiplied by three.

8. I am the number of hours in a day.

9. I am five more than sixty.

10. I am the number of days in a week.

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