In today’s optical illusion challenge, only 1% of people with sharp vision can spot the hidden number '99' among a sea of '96 ...
Killer sudoku is similar to the other levels in that each of the numbers 1-9 must fit into each 9-by-9 square. No number can ...
This fun optical illusion tests your ability to focus! The cluster of related numbers conceals a number. Within 9 seconds, identify the concealed number among these numbers. To reveal the deception, ...