sara had some 2 rupee and 5 rupee coins in her money box. she exchanged them for some 10 rupee coins. if the number of 5 rupee coins is one less than the number of 2 rupee coin, then find the number of 5 rupee coin
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Some students of a school planned a picnic. The budget was 500. But 50 of them failed to come and thus the cost of the food each student increased by 5. how many student attended the picnic
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