Mary gives 1/4 * 400 = <<400*1/4=100>>100 sheep to her sister.

She now has 400 - 100 = <<400-100=300>>300 sheep remaining.

She then gives 1/2 * 300 = <<300/2=150>>150 sheep to her brother.

So 300 - 150 = <<300-150=150>>150 sheep remain.

# Answer

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Question:
Mary has 400 sheep on her farm. She gave a quarter of her sheep to her sister, and half of the remaining sheep to her brother. How many sheep remain with Mary?
Answer:
Let's think step by step.

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150
Mary has 400 sheep on her farm. She gave a quarter of her sheep to her sister, and half of the remaining sheep to her brother. How many sheep remain with Mary?
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