Billy arrives 12 minutes too late for the 14:12 train from London to Oxford. This train runs every hour at 12 minutes past the hour. How long must he wait for the next train?
If you want to do well in your IQ test, get some sleep! Depriving yourself of sleep has A LOT of negative effects on your brain’s capacity to function. It can negatively impact your memory, impair your judgment and stop you from being able to react quickly to new situations.