Problem at the Bank - Solution

A bank customer had £100 in his account. He then made 6 withdrawals, totaling £100. He kept a record of these withdrawals, and the balance remaining in the account, as follows:    

There is no reason whatever why the customer's original deposit of £100 should equal the total of the balances left after each withdrawal.

The total of withdrawals in the left-hand colum may equal £100, but is is purely coincidence that the total of the right-hand column is close to £100.

Let us show another example, but starting with £200 in the bank:

Moral of this story? Don't Total Balances.

Puzzle supplied by Richard Rider