View All num of num See all Photos Dropbox www.dropbox.com Engaged Employer Overview Reviews Salaries Interviews Jobs Photos Benefits 126 Reviews 144 Salaries 414 Interviews 178 Jobs Follow Add Review or Salary Follow Add Review or Salary Interview Question User Operations Agent Interview Austin, TX Dropbox There are two children, 5 and 6 year olds who understand addition and subtraction. They do not understand multiplication or division. How would you explain the concept of prime numbers to them? Tags: brain teaser See more , See less 8 Answer Add Tags Answer Interview Answer 1 Answer ▲ 0 ▼ Take 11 (prime number) objects and ask the children to split the objects into 2 groups with the same number of objects in each. Repeat the process and ask the children to split the 11 objects into 3 separate groups. There will always be one group with an extra object. Interview Candidate on Nov 1, 2013 Interviews > User Operations Agent > Dropbox Add Answers or Comments To comment on this, Sign In or Sign Up.