Just an FYI, the claim you make "ONLY PEOPLE WITH AN IQ OF 120+ CAN FIND FIVE DIFFERENCES" is pure and utter BS! The average IQ is 100 +/- 10! I have geriatric patients (I'm a doctor) who do these types of puzzles as part of their therapt to recover from a stroke or an accident etc., they help retrain the brain but I have seen patients with an IQ of 60 after a head injury who can do them just fine. You make yourselves look bad making claims you clearly did NOT research! I like 'ISTRYS' better!