Critical Thinking Riddle with an Answer to Tickle your Mind

This is a very interesting critical thinking riddle that will tickle your mind. In this mind-tickling brain teaser, you have to calculate the minimum number of tickets you need to buy for 4 fathers, 3 grandfathers, and 4 sons. Think out of the box to solve this critical thinking brain teaser and post your answer in the comments.

Can you solve this critical thinking riddle?

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5 Tickets
Let's put the relationship below
A-B-C-D-E where B is the father of A, C is the father of B, D is the father of C and E is the father of D.
Now A, B, C, and D are sons (Four Sons)
B, C, D, and E are fathers (Four Fathers) and
C, D, and E and Grandfathers (3 Grandfathers)

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