Each entry in the list of numbers below is a Positive Integer:
a, 8, b, c, d, e, f, 2
If the sum of ANY four consecutive terms in the list is 17, what is the value of c + f?
Each entry in the list of numbers below is a Positive Integer:
a, 8, b, c, d, e, f, 2
If the sum of ANY four consecutive terms in the list is 17, what is the value of c + f?
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HINT : You are given that
$a+8+b+c=17$
$8+b+c+d=17$
$b+c+d+e=17$
$c+d+e+f=17$
$d+e+f+2=17$
Can you use these to find $c+f$? For example if you subtract 2 from 1 you get $a=d$. When you subtract 5 from 4 you get $c=2$. Try playing around with these five equations.