SOLUTION: My 10 year old daughter has been given the number line 99 100 199 227 406 460 466 644 to solve and even her teacher can't work it out, can you help???!!

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Question 278894: My 10 year old daughter has been given the number line 99 100 199 227 406 460 466 644 to solve and even her teacher can't work it out, can you help???!!
Answer by ladyVenny(3) About Me  (Show Source):
You can put this solution on YOUR website!
the simple answer is put them all in order from least to greatest add them all up and divide the answer by how many ever numbers there are