1) Which is not a factor of 20 a) 5 b) 6 c) 2 d) 4 e) 10 2) What is the LCM of 6 and 8 a) 12 b) 20 c) 32 d) 24 e) 2 3) Which is HCF of 18 and 24 a) 72 b) 9 c) 3 d) 6 e) 4 4) if the product of numbers is 50 and their LCM is 10 what is HCF a) 500 b) 5 c) 10 d) 50 e) 25 5) if the HCF and LCM of two numbers is 18 and 162 and one number is 36 the other number is  a) 81 b) 368 c) 258 d) 810 e) 2016 6) 3 / 25 is a TERMINATING DECIMAL a) YES b) MAY BE OR MAY NOT BE c) NONE OF THESE d) NO 7) which are not a terminating decimal a) 5 / 9 b) 3 /15 c) 49 / 70 d) 8 /250 8) Which is a irrational number a) 45 b) -53 c) 3 1/2 d) 46 9) Which is not a common multiple of 12 and 15 a) 60 b) 30 c) 120 d) 180 e) 1080 10) Which can have a zero at its unit place if calculated. a) 410 b) 58 c) 6100 d) 750 e) none of these

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