The top line of the puzzle shows 3 beer bottles, which equal the number 30.
The next line shows 1 beer bottle and 2 burgers, which makes 20.
1 burger and 2 pictures of 2 pint glasses filled with beer add up to nine.
But then it gets tricky: 1 burger, 1 pint glass and 1 beer bottle is left blank for you to calculate.
A common answer has been 60:
Bottle: 10
Burger: 5
Pint x2: 2
Pint: 1
And then you need to remeber to multiply on the last line…
But according to some, this is incorrect and you should use the PEMDAS formula (Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction).
With that logic, you multiply one by 10 first to get 10, and then add on five to make 15.
Did that make sense to you? Or do you have a third answer? Please hit the commentaries with your take on this!