What are the prime factors of 105 and 52?

Iam so stuck. what is the worked out answer for this question?

James is playing his favorite game at the arcade. after playing the game 3 times, he has 8 tokens remaining. he initially had 20 tokens, and the game costs the same number of tokens each time. the number tt of tokens james has is a function of gg, the number of games he plays

Which of the following statement about pascal's triangle are true?