Question

If the average of these four numbers is 21, find the missing number.

12, 18, 28, ?



What is the missing number and why
Ms. Sue
4 * 21 = 84

12 + 18 + 28 = 58

84 - 58 = ?

Anonymous
26!
Ms. Sue
Yes!
Kay
12+18+28+x/4=21 58+x=84 x=84-58=26
gggggggggggg
26
Owen
26!!!
Anonymous
If the average of these four numbers is 21 find the missing number 12,18,28,_,_,_.
Macy
26
Anonymous
26
LiLac
IDK HOW BOUT U