WHATSAPP may not have any built-in games, but that doesn't mean you can't have fun with your mates.

Here are five games you can play on the US chat app using your keyboard and a bit of copying and pasting.

1) Tic tac toe
An oldie but a goldie, tic tac toe is a game in which two players battle it out to complete a row, a column, or a diagonal with either three O's or three X's.

Competitors take turns to draw either a nought or a cross in the spaces of a grid of nine squares.

You can play tic tac toe with a friend on WhatsApp – or any other messaging app for that matter – using emojis.

Simply start with a grid of nine white squares organised in three by three rows and columns.

For the first turn, either you or your pal should copy and paste the grid into their text box and replace one of the white squares with either an O or X.

The next player can then copy and paste that grid, adding their own counter, and so on.

A deceptively simple yet infuriating game of 'find the number'

2) Find the number
The way you play "find the number" is self-explanatory: Spam your text field with dozens of one number, hiding a separate number somewhere in the middle.

Send it to your friend with a time-limit and see how they get on.

The game works best using digits that look similar – "8" and "9", for instance, or "2" and "5".

If you can't be bothered entering all those numbers in yourself, you can always copy and paste the version above.

This fiendish quiz requires you to guess the movie based on the emojis

Some are a lot harder than others...

3) Emoji quiz

This infuriating test challenges players to guess the 24 movie titles from a sequence of emojis.

While some will be a doddle to solve others will leave you scratching your head, with only true film buffs coming out on top.

Some emojis sequences “spell out” the title, while others contain famous clues from the films.

Think you know your James Bond from your Jaws? Answers can be found below.

Can you find the 'hidden tiger' in this image.

4) Find the hidden tiger

Everyone loves a good visual puzzle, and this one challenges you to find the "hidden tiger" in the image above.

It may seem simple, but it's trickier than it first appears. The words "the hidden tiger" can be found etched into the big cat's stripes.

Test your friends' wits by copying and pasting the image above into your WhatsApp chats.

In this brain training challenge, you need to figure out which water tank will fill up first

5) Tank test

Another one for the brain trainers out there: For this challenge, you need to figure out which water tank will fill up first.

The answer is tank number one, which fills up first as it is receiving water constantly.

Only when tank one is completely full will the other tanks fill up to the top.–thescottishsun.co.uk