3 Tooth Paste, : Profit 
6 Find the Missing Number 
3 

Tooth Paste, : Profit 
28 

12 Identical Balls 
Find the Missing Number
The Answer is this, I followed this., 74 = 28 = 8 (last digit) 39 = 27 = 7 65 = 30 = 0 or 10 38 = 24 = 4 context 
3
6
Tooth Paste, : Profit
There are 2 Persons, Who Saves Money.
One person Bought a tooth Paste of 100 gms, for Rs. 40.
The second person Buys, Two 50 gms for Rs. 20 each. at same shop, the same company of Pastes.
No Extra past
...

Doable
