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Question: What is the sum of the square root of 4/9 and the square root of 9/16? Express your answer as a mixed number.
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2/3 + 3/4 = 17/12 = 1 5/12 
Question: How many numbers between 1 and 100 can be written using only the digits {1,2,3,4, and 5}? repeating digits o.k.
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30 one digit numbers: 5 two digit numbers: 5*5 = 25 TOTAL = 30 
Question: What positive number is twelve less than its own square?
What negative number is twelve less than its own square?
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a. 4, which is 12 less than 16.
b. 
Question: Name two prime numbers with a sum of 1000 and the greatest possible difference.
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