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Home » Brain Teasers » The Smart Scholar Method
 Puzzle # 10 Easy Method > Weather vagaries in Vietnam
Easy does it! The Smart Scholar Method
There could be rainy mornings followed by clear afternoons, clear mornings followed by rainy afternoons, and clear mornings followed by clear afternoons. There can’t be any entirely rainy days.
If m is the number of rainy mornings, the total duration of stay in BMT was 12 + m. If a is the number of rainy afternoons, the total duration of stay in BMT was 13 + a. As there are no entirely rainy days, and it rained on 15 days, m + a = 15. Solving, m = 8 and a = 7.
The stay in BMT was 12 + 8 = 20 days. The vacation was twice as long, that is, 40 days.
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