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1.
What is the HCF of 3/5, 7/10, 2/15, 6/21?
2.
The HCF and LCM of two numbers is 84 and 840 respectively. If the first number is 168, find the second one.
3.
Sum of 2 numbers is 128 and their HCF is 8. How many numbers of pairs of numbers will satisfy this condition?
4.
Find the least number which when divided by15, 21, 24 and 32 leaves the same remainder 2 in each case.
5.
Find the least number which when divided by 10, 15, 18 and 30 leaves remainders 6, 11, 14 and 26 respectively.
6.
Find the smallest number of 4 digits which is exactly divisible by 12, 15, 21 and 30.
7.
Find the least number which when divided by 2, 5, 9 and 12 leaves a remainder 3 but leaves no remainder when same number is divided by 11.
8.
HCF and LCM of two numbers is 5 and 275 respectively and the sum of these two numbers is 80. Find the sum of the reciprocals of these numbers.
9.
The HCF and LCM of two numbers is 70 and 1050 respectively. If the first number is 210, find the second one.
10.
Find the least number which when divided by 2, 3, 4 and 5 leaves a remainder 3. But when divided by 9 leaves no remainder?