61. The sum of two numbers is 528 and their HCF is 33. The number of pairs of numbers satisfying the above conditions is = ?
62. The product of two numbers is 2008 and their HCF is 13. The number of such pairs is = ?
63. HCF and LCM of two numbers are 7 and 140 respectively. If the numbers are between 20 and 45, the sum of the numbers is = ?
64. The least number which when divided by 4, 6, 8 and 9 leave zero remainder in each case and when divided by 13 leaves a remainder of 7 is = ?
65. The ratio of two numbers is 13 : 15 and their LCM is 39780 . The numbers are = ?
66. The LCM and ratio of four numbers are 630 and 2 : 3 : 5 : 7 respectively. The difference between the greatest and least numbers is = ?
67. The number nearest to 10000, which is exactly divisible by each of 3, 4, 5, 6, 7 and 8 is = ?
68. The HCF and LCM of two 2-digit number are 16 and 480 respectively. The numbers are ?
69. A number which when divided by 10 leaves a remainder of 9, when divided by 9 leaves a remainder of 8, and when divided by 8 leaves a remainder of 7, is = ?
70. The HCF and LCM of two numbers are 12 and 336 respectively. If one of the numbers is 84, the other is = ?
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