Something is random when you cannot predict what will happen next. No pattern, no plan — just chance!
Think about rolling a dice. Before you roll, you have no idea if it will land on 1, 2, 3, 4, 5, or 6. Each number has an equal chance. That's randomness!
The key idea:
Randomness means every outcome has a fair chance, and the past does NOT help you predict the future. Rolling a 6 ten times in a row doesn't make a 6 less likely next time!
Fun fact — the word "random" originally meant "running fast with no direction" in old French. Today it means having no pattern at all!
Not everything that feels random actually is! Let's look at the difference between true randomness and things that just seem random.
Computers and randomness
Computers follow rules, so they can't be truly random. Instead they use complicated maths to make numbers that look random. These are called pseudo-random numbers (pseudo means "fake").
Humans are bad at being random!
If you ask someone to pick a number from 1 to 10, most people say 7. We have favourite numbers and patterns — our brains are not random machines!
Press the buttons and watch randomness happen! Notice how results are unpredictable each time.
Roll the dice
Flip the coin
What do you notice?
After many flips or rolls, the results start to even out. This is called the Law of Large Numbers!
Randomness is everywhere — in nature, science, games, and everyday life!
Without randomness, video games would always be the same, science would be unfair, and the internet would be much less secure!