Check the calcs

[Phil]

Wife brought me this one to do.
(she did it in about 1.5 minutes flat)

Ok, so I admit I am not the fastest and tend to go into lots of analysis.

Opened up Excel and started calculating. After about 10 minutes of analysis-paralysis I got the asnwer.

Cheers
Phil

Complete the range
111 = 13
112 = 24
113 =
114 =
115 =
116 =
117 =
118 =
119 =
110 =

 

[Robert]

probably the wrong logic but
13
24
35
46
57
68
79
90
92
2

 

[Phil]

probably the wrong logic but
13
24
35
46
57
68
79
90
92
2

90
101
112

How long did it take you?

 

[Newbie_Neil]

Surely the last one is 2.

 

[9fingers]

That's what I thought too Neil

formula I used is

answer = LSD x 10 + sum of all the digits

but with only two solutions completed I guess it could be something else?

 

[Phil]

Dont complicate it like I did.

It is simply multiples of 11. Just add 11 to the last answer.

Cheers
Phil

 

[9fingers]

But that means there is no relationship between the columns.
The left is not monotonic but your answer sequence is.
Had 110 been at the top of the left hand column then I'd agree with you.

Bob

 

[Rod]

Last one must be 2 but I guess it's a typo and question is 120?

 

[Robert]

probably the wrong logic but
13
24
35
46
57
68
79
90
92
2

90
101
112

How long did it take you?

about a minute and as Bob explained - last digit x10 then add sum of the three individual digits.

 

[TrimTheKing]

I think Bob's right. Initially I did it as multiples of 11 but didn't take into account the wrong starting number on the left column for that to be right.

Cheers
Mark

PS and that would correctly make the final answer 2.

 

[Newbie_Neil]

This logic I used was: -

(((digit 1 * 10) + digit 2) * digit 3) + (digit 1 + digit 2)

111 = (11 x 1) + 2 = 13
112 = (11 x 2) + 2 = 24
113 = (11 x 3) + 2 = 35
114 = (11 x 4) + 2 = 46
115 = (11 x 5) + 2 = 57
116 = (11 x 6) + 2 = 68
117 = (11 x 7) + 2 = 79
118 = (11 x 8) + 2 = 90
119 = (11 x 9) + 2 = 101
110 =(11 x 0) + 2 = 2 (edited - thanks Bob for spotting the typo.)

 

[9fingers]

This logic I used was: -

(((digit 1 * 10) + digit 2) * digit 3) + (digit 1 + digit 2)

110 =(11 x 0) + 2 = 2

typo perhaps?

Bob

 

[Newbie_Neil]

This logic I used was: -

(((digit 1 * 10) + digit 2) * digit 3) + (digit 1 + digit 2)

110 =(11 x 0) + 2 = 2

typo perhaps?

Bob

Err, yes. Well spotted Bob.