TCS Company Logical Reasoning General Mental Ability

There are 16 teams divided in 4 groups. Every team from each group will play with each other once. The top 2 teams will go to the next round and so on the top two teams will play the final match. Minimum how many matches will be played in that tournament?

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TCS Other Question

the shopkeeper charged 12 rupees for a bunch of chocolate, I bargained to shopkeeper got two extra ones, that made them cost one rupee for dozen less than first asking price.
how many chocolates
I received in 12 rupees?
How many vehicle registration plate numbers can be formed with digits 1,2,3,4,5 (no digits being repeated) if it is given that the registration number can have 1 to 5 digits?