The sum of two numbers is 36 and their H.C.F. is 4. How many pairs of such numbers are possible

The sum of two numbers is 36 and their H.C.F. is 4. How many pairs of such numbers are possible
1). 1
2). 2
3). 3
4). 4

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1. The sum of a pair of positive integer is 336 and their H.C.F. is 21. The number of such possible pairs is

2. The least perfect square, which is divisible by each of 21. 36 and 66 1s

3. The LCM of two numbers is 864 and their HCF is 144. If one of the number is 288. the other number is :

4. The LCM of two numbers is 44 times of their HCF. The sum of the LCM and HCF is 1125. If one number is 25, then the other number is

5. The HCF and product of two numbers are 15 and 6300 respectively. The number of possible pairs of the numbers is

6. The HCF of two numbers is 15 and their LCM is 225. If one of the number is 75, then the other number is:

7. The least number which when divided by 16, 18. 20 and 25 leaves 4 as remainder in each case but when divided by 7 leaves no remainder is

8. The sum of two numbers is 45. Their difference is $\frac{1}{9}$ of their sum. Their L.C.M is

9. The HCF and LCM of two numbers are 18 and 378 respectively. If one of the number is 54, then the other number is

10. The LCM of two numbers is 520 and their HCF is 4. If one of the number is 52, then the other number is