What is the value of $w+z$ if $1I am having solving the following problem:

If the product of the integer $w,x,y,z$ is 770. and if $1<w<x<y<z$ what is the value of $w+z$ ? (ans=$13$)

Any suggestions on how I could solve this problem ?

The number 770 is the product of the prime numbers 2,5,7,11 ,
and 1<2<5<7<11
Thus, the answer is 2+11 = 13 .
Hope this helps
