2007-04-10 13:01:59 · 5 answers · asked by Jessica K 1 in Science & Mathematics ➔ Mathematics
The answer is 35.
See:
5-11+17-23+29-35+41 -47+53-59+65 = 35
The subtraction and addition signs just alternate
as the numbers increase by 6.
Then solve.
2007-04-10 13:06:54 · answer #1 · answered by rebaparty 1 · 1⤊ 0⤋
5-11+17-23+29-35+41 -47+53-59+65=35
2007-04-10 13:10:07 · answer #2 · answered by Jean 2 · 0⤊ 0⤋
5-11+17-23+29-35+41-47
+53-59+65=35
2007-04-10 13:11:57 · answer #3 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋
5-11= -6
-6+17= 11
11-23= -12
-12+65= 53
The answer is 53
2007-04-10 13:07:08 · answer #4 · answered by sagilltwins 1 · 0⤊ 1⤋
observe the -6 sum for each two terms. well, there's 11, so it's 10 * -6 + 65. therefore, it's 5.
Patterns are useful in math.
2007-04-10 13:05:56 · answer #5 · answered by Xadow 2 · 0⤊ 1⤋