A reverse phone lookup can reveal the name and address associated with a phone number. But beware of websites asking for your personal information.

How can you check who is calling you if a number is not in your contacts? Learn what reverse phone lookup is, how to use it to your benefit, and which apps to choose.

Here are 3 easy ways to calculate the square root of a number in Microsoft Excel - using SQRT function, POWER function and Exponential formula.

You square a number when you multiply it by itself: 5 squared is 25, since 5 x 5 = 25. Reverse the process to find square roots. The square root of 25 is 5.