human
Mary has 300 sheep and Bob has double the number of sheep as Mary plus another 35. How many sheep must Mary buy to have 69 fewer sheep than Bob?
assistant
How many sheep does Bob have? ** Bob has (300*2) + 35 = <<300*2+35=635>>635 sheep
How many sheep does Mary own? ** For Mary to have 69 sheep fewer than Bob she must own 635 – 69 = 566 sheep
How many sheep must Mary buy? ** As Mary has already 300 sheep she must buy 566 – 300 = <<566-300=266>>266 sheep
#### 266