Mathematics (High School) quiz

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Suppose that we roll two fair 6-sided dice. What is the probability that the two numbers rolled sum to 4?
Find the sum of the primes between 100 and 200, inclusive, that are 1 or 2 more than a perfect square.
What interval consists of all $u$ such that neither $2u$ nor $-20u$ is in the interval $(-\infty,-1)$ ?

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