Balloon RaceScience brain teasers require understanding of the physical or biological world and the laws that govern it.
One class started to hold an activity in which three different lengths of straw attached to a fully blown up balloon and then a string was drawn through the straw, thus giving the balloon a railing in which it can move on. When the three balloons were let go all at the same time, the class went to see which one got there first. Try to figure out which balloon got there first using the following straw lengths:
Group 1: 5 cm Group 2: 15 cm Group 3: 25 cm What Next?
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