Difference game: if you have eagle eyes, find 5 differences and solve this brain teaser. There is 4 weeks by Evelyn Archer

Brain observation test: if you have hawk eyes, find the number 2 among 4 in 12 seconds. There is 1 month by Evelyn Archer

Brain observation test: if you have hawk eyes, find the number 8445 in 15 seconds. There is 1 month by Evelyn Archer

Brain observation test: if you have sharp eyes, find the number 8912 in 20 seconds. There is 2 months by Evelyn Archer

Brain Observation Test: If you have eagle eyes, find the upside-down P in 12 seconds. There is 2 months by Evelyn Archer

Challenge for geniuses: If you have a high intellectual coefficient, then you can solve this mathematical challenge in less than 30 seconds. There is 2 months by Evelyn Archer

Brain observation test: if you have hawk eyes, find the number 578 among 570 in 15 seconds. There is 2 months by Evelyn Archer

Intelligence quotient test Puzzles: Can you solve it and determine the value of each element? There is 2 months by Evelyn Archer

Visual puzzle challenge: only keen eyes can find the 10 differences in less than 40 seconds. There is 3 months by Evelyn Archer