71. If the product of two numbers is 324 and their HCF is 3, then their LCM will be = ?
72. What is the least number which when divided by the number 3, 5, 6, 8, 10 and 12 leaves in each case a remainder 2 but when divided by 22 leaves no remainder ?
73. The LCM of two numbers is 20 times their HCF. The sum of HCF ans LCM is 2520. If one of the number 480, the other number is = ?
74. The largest 4-digit number exactly divisible by each of 12, 15, 18 and 27 is?
75. If HCF of p and q is x and q = xy, then the LCM of p and q is = ?
76. The HCF and LCM of two numbers are 84 and 21 respectively. If the ratio of the two numbers is 1 : 4 , then the larger of the two numbers is = ?
77. Three numbers are in the ratio 2 : 3 : 4, If their LCM is 240 the smaller of the three numbers is = ?
78. The HCF of two numbers , each having three digits, is 17 and their LCM is 714. The sum of the numbers will be ?
79. The smallest number, which when divided by 5, 10, 12 and 15, leaves remainder 2 in each case , but when divided by 7 leaves no remainder , is = ?
80. If the sum of two numbers is 36 and their HCF and LCM are 3 and 105 respectively, the sum of the reciprocals of the numbers is = ?
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