Using mathematical symbols

ritwik2410 wrote:

How can I use mathematical symbols while using pages, numbers ,keynotes ?

Add mathematical equations in Pages on iPad - Apple Support

If the question is really just how to get symbols not on regular keyboards, the answer is to download something from the App Store, like UnicodePad or The Math Keyboard.

Yes, but for more advanced mathematical symbols, you may need to install an appropriate fonts.

Install and manage fonts on iPad – Apple Support

I already gave you the names of two apps. Did you not see that?

ritwik2410 wrote:

please suggest an appropriate font

You really don’t need to worry about adding fonts until you see what the those already installed can do.