Yes, I have tried to apply Kirchkhoff's and loop rule for this ciruit, but it didn't helped, as it gives only the values of the current flowing through particular resistor not the total resistance between points A and B. Regarding the transforms, I am not familiar with that yet.
Thank you, I will learn how to do it. I am just learning and new here, so would appreciate solution for my problem, the problem seems very unique for me as it's really challenging for me to determine whether the resistors are in parallel or in series, otherwise I wouldn't post it here.
I attempted to solve the problem using the formulas I have provided above, but my answers are not matching, also I tried to search for similar problems in the internet but found nothing