1) What is the LCM of 2 & 4 a) 4 b) 8 c) 2 d) 1 2) Find the great factor of 20, 15, 12 a) 2 b) 15 c) 42 d) 1 3) The LCM 28& 30 a) 140 b) 20 c) 120 d) 60 4) The HCF of 12 and 18 a) 11 b) 39 c) 6 d) 2 5) The LCM of 15 and 30 a) 11 b) 375 c) 153 d) 315 6) Find the first 5 multiples of 3 a) 3,9,6,15 & 12 b) 3,6,9,10,18,90 c) 3,6,9,12,15 d) 0,1,3 7) How many prime numbers are there from 1 to 100 a) 80 b) 10 c) 25 d) 90 8) How many composite numbers are there from 1 to 100 a) 29 b) 74 c) 99 d) 106 9) Are natural numbers whole numbers? a) Yes b) No 10) Are all whole numbers natural numbers? a) True b) False

HCF & LCM

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