There are 25 buildings on Maple Street. Of these 25 buildings, 10 have fewer than 6 rooms, 10 have more than 7 rooms, and 4 have more than 8 rooms. What is the total number of buildings on Maple street that have 6,7, or 8 rooms?
a) 5 b) 9 c) 11 d) 14 e) 15 From an old ACT EXAM. Click here for the answer.
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If A is the set of prime numbers and B is the set of 2 digit positive integers whose unit digit is 5, how many numbers are in common for both sets?
A) NONE B) ONE C) TWO D) SEVEN E) NINE ANSWER Set L= {all integers between 1 and 50} Set M = {all integers divisible by 2 and 3} Set N = {All positive, even integers} If Set J is the intersection of the three previous sets, then what is the sum of the numbers in Set J? ANSWER From an old SAT exam
In a large high school, some teachers teach only one subject and some teachers teach more than one subject. Using the information given below about math, science, and gym teachers in the school, how many teach math only?
A variant of an ACT type problem
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