Puzzle 63 - Solution

 The question was

 In a certain bank the position of cashier, manager and teller are held by Brown, Jones and Smith, though not necessarily respectively.
The teller, who was an only child, earns the least.
Smith who married with Brown’s sister, earns more than the manager

As the teller is the only child he can't be Brown - Brown has a sister. He can't be Smith either because Smith earns more than the manager.

So teller has to be Jones.

Smith earns more than the manager - and he can't be manager or teller. Smith has to be cashier.

Now only one left is Brown. He is the manager.

Very simple. And we like simple!