Test your IQ, here is the story, 3 friends went to a restaurant to have a meal. After the meal, they decided to split the bill. The total bill is $25, so each of them came out with $10. Three $10 total to $30 and after minus $25, they are left with $5. They took back $1 each and gave waiter $2 as tips. While walking to the car park, suddenly one of them who looks very serious in his thought turn to his friends and started to complain and claim that his friends cheated $1 from him. So, how could this be possible? Let's examine his case. First, each one came with $10 and took back up $1. Therefore, $10 minus $1 equal to $9. This means total bill should be $9 times 3 equal to $27. Plus the $2 waiter's tip, it should work out to be the amount equal of $29. Aha, mysteriously missing $1. So, what do I miss here? Can you figure how could it happen? Well, the answer is BODMAS.