We all like to test our brain now and again, but some teasers are harder than others.
A newly surfaced puzzle tests the efficiency of someone's eyesight as allegedly only those who have eyes like a hawk can spot the hidden number within the given timeframe, according to the Mirror.
The task is simple - challengers must attempt to find the number 725 among the 775s within the busy image. While the task is relatively straightforward, it's not as easy to spot the missing number.