question unclear. need more details.
But for office work like MS word, PowerPoint, Excel, and Outlook the Pentium can serve you well.
And most laptop that priced around $200 to 300 is suitable to you.
If you need more performance, the i3 is best. Or i5, kinda overkill but you will taste the real speed in huge excel spreadsheet or hardcore word editing that contains alot of pictures and visuals.
Cheers!