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 :

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 :
1). 70
2). 77
3). 63
4). 56

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1. If x:y be the ratio of two whole numbers and z be their HCF, then the LCM of those two numbers is

2. Let the least number of six digits which when divided by 4, 6, 10, 15 leaves in each case same remainder 2 be N. The sum of digits in N is :

3. The greatest number of four digits which when divided by 12, 16 and 24 leave remainders 2.6 and 14 respectively is

4. Sum of two numbers is 384. H.C.F. of the numbers is 48. The difference of the numbers is

5. The least number, which when divided by 18, 27 and 36 separately leaves remainders 5,14 , and 23 respectively, is

6. If the students of a class can be grouped exactly into 6 or 8 or 10, then the minimum number of students in the class must be

7. The sum of the H.C.F. and L.C.M of two numbers is 680 and the LC.M. is 84 times the H.C.F. If one of the number is 56, the other is :

8. L.C.M of $\frac{2}{3}$, $\frac{4}{9}$, $\frac{5}{6}$ is

9. The least multiple of 7, which leaves the remainder 4 , when divided by any of 6. 9, 15 and 18, is

10. The product of the LCM and the HCF of two numbers is 24. If the difference of the numbers is 2, then the greater of the number is