This is not an easy task people with sharp eyesight will be able to solve this challenge as you need to spot 10 blueberries under the sharp timeline of 30 seconds. This is not an easy task people with sharp eyesight will be able to solve this challenge as you need to spot 10 blueberries under the sharp timeline of 30 seconds. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle