How to work key pad - Dell Inspiron 1525 Notebook

If You mean keyboard number pad Press the "Num Lk" button, which is located to the right of the "F12" key along the top of the keyboard, to turn on the keyboard number pad. The Inspiron 1525 number pad mimics the type of the number pad you would find on a larger keyboard. The blue numbers on the keys in the middle of the keyboard are activated when you press the "Num Lk" button. For example, if you press the "U" button on the keypad, a "5" will appear on the screen when the "Num Lk" is enabled. Press the "Num Lk" button again to turn off the number pad