Question

challenge for everyone....​

Answer 1

Answer:

Go through the attachment

Answer 2

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 50  -   20  =  30

 30  -  15  =  15 

 15  -   9   =   6

  6   -   6   =  0

============

101  -  50  =  51

The problem says we get 51 when we add the balances, but we must get 50 - is the idea.

However,  we should only add the spent amounts.  We cannot add the balances.. See the following example I give here.   In this, start with 50 and spend 10 in 5 steps.  Then balances will be 40, 30 etc.

 50  -  10   =  40 

 40   -  10  =  30

 30  -  10   = 20

 20  -  10  = 10

 10  -  10  =  0

=============

        50    =  100