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Solving number riddles - English lesson

Key vocabulary for solving riddles:
To understand the riddles, it's important to know some words and expressions that are commonly used to describe numbers in English. Here are the most essential ones:

1. Basic maths operations:
addition (plus): plus = plus
Example: Five plus five = ten

subtraction (minus): minus = minus
Example: Ten minus three = seven

multiplication (times): times = times / multiplied by = multiplied by
Example: Two times three = six

division (divided by): divided by = divided by
Example: Eight divided by two = four

half: half = half of
Example: Half of ten = five

double: double = double of
Example: Double of ten = twenty

2. Comparing numbers:
more than: more than = more than
Example: Five is more than three

less than: less than = less than
Example: Six is less than eight

between: between = between
Example: I am between five and seven

3. Other useful terms:
the sum of: the sum of = the sum of
Example: The sum of five and ten is fifteen

the product of: the product of = the product of
Example: The product of two and five is ten

How to solve riddles:
Here are the steps to solve a number riddle in English:

1. Read the description of the number carefully
In each riddle, a number is described using words. Take your time to read the description in English. Look for keywords that tell you what operation to do (such as more than, half, times).

2. Understand the keywords
Make sure you understand what each word means. If you don't understand a term (e.g., divided by or double), make sure to look it up or ask for help before continuing.

3. Do the calculation mentally or on paper
Once you understand the riddle, perform the operation indicated. This could be addition, subtraction, multiplication, or comparison.

4. Write the answer in digits
The answer should be written as numbers (not in words).

Practical tips:
Reread the riddle multiple times to make sure you've fully understood the terms.

Practice basic math operations in English regularly.

Use an online dictionary or ask for explanations for words you don't understand.

(!) The answers should be written as numbers (not in words).
All the answers are explained.

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1. I am the number of days in February (in a leap year).

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