This brain puzzle is engaging as you need to guess which bucket will fill first, but you need to make up your find under a 7-second strict time frame. Also, mind that you have to use all of your brain as around 90% of people out of 100 failed to give the right answer. This brain puzzle is engaging as you need to guess which bucket will fill first, but you need to make up your find under a 7-second strict time frame. Also, mind that you have to use all of your brain as around 90% of people out of 100 failed to give the right answer. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle