1/4 divided by 5

answers stat will mark brainlist, only if explanation is given

Question 5 spring semester final exam math evaluate

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Fred has a spinner that is split into four equal sections: red, blue, green, and yellow. fred spun the spinner 688 times. which of the following would be a good estimate of the number of times the spinner lands on the green section? a. 269 b. 603 c. 344 d. 189