This should be so easy. It's just... counting. So why is the internet having such a hard time of it?
Here's the premise: Look at a sequence of numbers and figure out which one is missing as quickly as possible without going through the digits one by one.
At first glance — and second and third — it's almost impossible to spot the omitted number between 1 and 49. See for yourself:
It's not some crippling mystery, and it doesn't challenge your logic, yet the Internet is having a hard time solving it.
Speed factor aside, once you take the time to actually count in numerical order, you should be able to get your answer.
Find it yet? Here's a hint: It's somewhere in between 20 and 40.