Brain teasers are trending as a fun way to enhance observational skills and boost IQ. A viral challenge prompts participants to spot three differences in a photo of Jerry within nine seconds. Succeeding in this task is a test of quick thinking and keen observation. Brain teasers are trending as a fun way to enhance observational skills and boost IQ. A viral challenge prompts participants to spot three differences in a photo of Jerry within nine seconds. Succeeding in this task is a test of quick thinking and keen observation. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle