Select all that apply. which of the following statements are true of the greatest common factor of two numbers? a. each number must share the factor. b. the number must be large. c. the greatest common factor could be 1. d. the number must be the largest factor both numbers share.

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years