Question

Tom has three times as many pencils as pens but has a total of 100 writing utensilmany more pencils than pens does tom have

Answer 1

Take 100/3 you get 25, then multiply it by three because that's how many pencils he has more than pens and you get 75 pencils. Then subtract 100-75 to get 25.  So Tom would have 25 more pencils than pens.