Overdraft protection is a service that is provided by a bank to their customer. For instance, if you are holding two accounts, saving and credit account, in the same bank. Now if one of your accounts does not have enough cash to process the cheques, or to cover the purchases. The bank will transfer money from one account to another account, which does not have cash so to prevent check return or to clear your shopping or electricity bills.

a) Checking Account: You can access the account as the saving account but, unlike saving account, you cannot earn interest on this account. The benefit of this account is that there is no limit for withdrawal.

b) Saving Account: You can save your money in such account and also earn interest on it. The number of withdrawal is limited and need to maintain the minimum amount of balance in the account to remain active.

c) Money Market Account: This account gives benefits of both saving and checking accounts. You can withdraw the amount and yet you can earn higher interest on it. This account can be opened with a minimum balance.

d) CD (Certificate of Deposits) Account: In such account you have to deposit your money for the fixed period of time (5-7 years), and you will earn the interest on it. The rate of interest is decided by the bank, and you cannot withdraw the funds until the fixed period expires.

A commercial bank is a type of bank that provides services such as accepting deposits, making business loans, and offering basic investment products.

Commercial bank can also refer to a bank or a division of a bank that mostly deals with deposits and loans from corporations or large businesses, as opposed to individual members of the public.

decimal point [i.e, 5.9]

Sum of all numerals must be ten because each numeral stands for the count of other numerals and because this number shall have ten numerals. Beginning to choose reasonable numerals for the first figure you can come across the correct number: 6210001000.

- Send the box with the lock to Alex. 

- Alex can't open it, but can put another lock on the box. 

- Alex sends this box with the 2 locks back to you, you unlock your lock and send it back to Alex again.

- So there is just Alex's lock on the box and Alex can now open it.