Lassie eats half of her bones on Saturday. On Sunday she received 10 more bones. She now has a total of 35 bones. How many bones did she start with before eating them on Saturday?
Thoughts? Step-by-step reasoning:
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35 bones at the end - 10 received = 25 on Sunday. Lassie ate half, so multiply by two to find the number of bones at the beginning which is 25 * 2 = 50 bones.
Thus, the answer is 50.
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