Insert four arithmetic means between -4 and 11.
A)$\quad - 1,2,5,8$
B) $- 1,3,6,9$
C) $\quad - 2,0,2,4$
D) $\quad 0,3,6,9$
E) $- 1,1,3,5$

Question

Insert four arithmetic means between -4 and 11. 
A)$\quad - 1,2,5,8$
B) $- 1,3,6,9$
C) $\quad - 2,0,2,4$
D) $\quad 0,3,6,9$
E) $- 1,1,3,5$

Quizplus · Accepted Answer

The difference between -4 and 11 is 15. To insert four arithmetic means between them, divide the total difference by the total number of intervals (5 in this case, since there are 4 means plus the interval to the final number). 15/5 = 3. Starting from -4 and adding 3 each time gives: -4, -1, 2, 5, 8, 11.

Insert Four Arithmetic Means Between -4 and 11 −1,2,5,8\quad - 1,2,5,8−1,2,5,8

Insert Four Arithmetic Means Between -4 and 11 $\quad - 1,2,5,8$