1) Which group has two composite numbers? a) a) 24 and 42 b) b) 35 and 53 2) Numbers that are co-primes will necessarily be prime too. a) True b) False 3) Prime numbers having a difference of two are called a) consecutive prime numbers b) twin primes c) prime numbers d) composite numbers 4) 0 and 1 are neither prime nor a) consecutive prime numbers b) twin primes c) prime numbers d) composite numbers 5) 2 is the only even and the smallest a) consecutive prime numbers b) twin primes c) prime numbers d) composite numbers 6) A PRIME NUMBER is... a) a number that has only one factor. b) a number that has at least two factors. c) a number that has more than two factors. d)  a number that has only two factors. 7) Four students each made a list of prime numbers. a) Eric b) Joan c) Maya d) Bella 8) Which of the following is a prime number? a) 12 b) 14 c) 15 d) 17 9) Use the factors tree method to find the missing digits. a) A= 54 , B = 3 b) A=1, B =1 c) A = 108, B =27 10) Find the missing digits using the short division method. a) X = 2, Y = 14 b) X = 3, Y = 2 c) X = 14, Y = 2

Grade 4 Prime and composite numbers

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