Question

Sequence question#2 - a childish one

Answer 1

I can work out the answer. The only thing I would like to see is your workings.

Answer 2

A. P. means: arithmetic progression?

Answer 3

tsk childish she says -____- haha

Answer 4

yes

Answer 5

I did it like this:
Sum of the 5 terms = (3+23)*5/2 = 65
a+b+c = 65 - 3-23 = 39
Any faster method?

Answer 6

by inspection
\[\{3,a,b,c,23\}=\{3,a,13,c,23\}=\{3,8,13,18,23\}\]

\[a+b+c=8+13+18=39\]

Answer 7

a+b+c = 3b

b = (3+23)/2

Answer 8

b has to be halfway in-between 3, and 23. so b =13

Answer 9

@experimentX Wow~ another cute solution!!!
@UnkleRhaukus Thanks!~

Answer 10

@UnkleRhaukus you are a physicist ... aren't you??

Answer 11

i am mid way through my bachelor of science (nuclear science technologies) degree

Answer 12

thats cool man ...!!!

Answer 13

thankyou very much,
what stage in your career are you at?