Hi gurus!


I am unsure of the solutions provided for the above question.


Q15c) It is a question to detect patterns.
Any gurus can help me visualise the patterns? Most most most appreciated! Don’t have the diagram so please help if you can.

100 x 49 = 4900 -> how & why?
4900 + 50 - 4950 - how & why?

Thanks in advance!!