Question
Andy has 5 pink beads and some yellow beads. Then his sister gave him 10 more yellow beads and he has a total of 21 beads. How many yellow beads did he have at first?
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Andy has 5 pink beads and some yellow beads. Then his sister gave him 10 more yellow beads and he has a total of 21 beads. How many yellow beads did he have at first?