Jim had a $10 voucher to spend on games for his smartphone. He bought three games at $1.99 each. Which expression shows how much he has left to spend?
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Which of the following numbers is prime?
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I counted the jelly beans in a small packet and found 6 white, 7 red, 4 yellow and 3 black jelly beans. What is the ratio of the black ones to the yellow jelly beans?