How to use the numbers 4, 7, 3, and 9 to get the number 25 only using the operations multiplication, division, and addition

(9 x 7)/3 + 4

Step-by-step explanation:

9 x 7 = 63

63 divided by 3 is 21.

21 + 4 = 25

(9*7)/3+4

Step-by-step explanation:

if you do 9*7 you get 63

then if you divide 63 by 3 you get 21

finally, add 21 to 4 and get 25

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.