Problem at the Bank
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 left in the account, as follows:
| Withdrawals | Balance left |
|---|---|
| $50 | $50 |
| $25 | $25 |
| $10 | $15 |
| $8 | $7 |
| $5 | $2 |
| $2 | $0 |
| $100 | $99 |
Why are the Totals not exactly right?
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Puzzle supplied by Richard Rider