Prime Numbers - Page 4

Questions
  • Is 54 a prime number or a composite number?
  • How many factors does the number 100 have?
  • What factors do 6 and 4 have in common?
  • What is the 9th multiple of 15?
  • Is the number 110 prime, composite, or neither?
  • What is an odd number under 50 with at least 5 factors?
  • What is all the prime factors of 20?
  • Is the number 73 prime, composite, or neither?
  • How many years older will you be 1.10 billion seconds be from now?
  • Is a multiple of the prime number 3 also a prime number?
  • What are the first five multiples of 7?
  • What is a prime number?
  • Which of these are not coprime numbers - (1) #32,24#; (2) #25,32#; (3) #15,22# and (4) #18,35#?
  • What number is four times larger than 6?
  • Why are #60 and 120# common multiples of #10 and 12?#
  • What are all the composite numbers between 31 and 51?
  • The 195,917th prime number times 2?
  • How can you write #56# and #68# as sum of two prime numbers?
  • How many 3-digit numbers can be created using the numbers 7, 8, 9, 10?
  • Is 22 prime or composite??