3 mathcounts problems – Nursing Writers Hub

98. Elisa had a new fishbowl but no fish, so Kendell gave her half of his goldfish. Elisaâ€s fishbowl was not very large, so she gave half of her new goldfish to Rocky. Rocky kept 8 of the goldfish he was given and gave the remaining 10 goldfish to Aster. What is the difference between Kendellâ€s starting number of goldfish and the number of goldfish Elisa kept for her new fishbowl?
99. In a school that has 20 teachers, 10 teach mathematics, 8 teach social studies and 6 teach science. Two teach both mathematics and social studies, but none teach both social studies and science. How many teach both mathematics and science?
100. A line segment has endpoints (−5, 10) and (a, b). If the midpoint of the segment is (13, −2), what is the absolute difference between a and b?
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