SAT Math Practice Question #24147 - SATify | SATify
#24147
number theory
logical reasoning
hard
120 sec
Students guess that Norb's age is 20, 25, 30, 35, 39, 40, 42, 45, 48, and 50. Norb says, "At least half of you guessed too low, exactly two of you are off by one, and my age is a prime number." How old is Norb?
