Question 1: LCM of two prime numbers x and y, (x > y), is 161. The value of 3y – x is (a) 2(b) -2(c) 0(d) -5

Question 2 : HCF of two numbers is 28 and their LCM is 336. If one number is 112, then the other number is(a) 56(b) 70(c) 84(d) 98

Question 3 :The HCF and LCM of two numbers are 12 and 72 respectively. If the sum of these numbers is 60,then one of the numbers will be(a) 12(b)24(c) 60(d)72

Question4. The H.C.F. and L.C.M. of two numbers are 12 and 336 respectively. If one of the numbers is 84, the other is(a) 36(b)48(c) 72(d)96

Question5 :The greatest number of four digits which is divisible by 15, 25, 40 and 75 is(a) 9000(b) 9400(c) 9800(d) 9600

Question 6: The H.C.F. of 0.54, 1.8 and 7.2 is(a) 1.8(b) 0.18(c) 0.018(d) 18

Question 7 : Sum of LCM and HCF of 4 , 20 and 28 is (a)74(b)136(c) 140(d)144

Question 8: The HCF of two numbers is 29 & their sum is 174. The possible numbers are(a) 1,174(b). 74,100(c)29, 154(d)29, 145