How to find GCD of any two numbers?

The LCM of two number is 192 and their product is 3072. Find the HCF of two numbers.

Four numbers are in G.P. The sum of first two numbers is 4 and the sum of last two numbers is 36. Find the numbers.

Write the largest and the smallest 8-digit number and also find how many numbers lie between these two numbers.

What is the sum of any two (a) Odd numbers (b) Even Numbers ?

For any two complex numbers z_1\ a n d\ z_2 and any two real numbers a ,\ b find the value of |a z_1-b z_2|^2+|a z_2+b z_1|^2dot

The sum of two digits of a two-digit number is 11. If 45 is added to this number, the digits get reversed. Find the number.

The HCF and LCM of two numbers is 15 and 90 respectively. If one of the two numbers is 30, find the other number

The sum of two digits of a two-digit number is 11. If 63 is added to the number, the digits get reversed. Find the number.

The product of any two irrational numbers is

The difference between two natural numbers is 196 and the ratio of the two numbers is 9:5. Find the two natural numbers.