Uncanny Addition
$begingroup$
? ?
+ ?
-----
?
Replace every question mark (?) in this addition with a single digit so that the addition is valid and correct. The first (leftmost) question mark in the first (upper) line cannot be zero (0).
Credit:
(2000@G4G) Jaime Poniachik (1943–2011)
mathematics lateral-thinking
edited Feb 6 at 20:00
Glorfindel
13.8k35084
asked Jan 29 at 8:41
yunzenyunzen
43611
$endgroup$
add a comment |
$begingroup$
? ?
+ ?
-----
?
Replace every question mark (?) in this addition with a single digit so that the addition is valid and correct. The first (leftmost) question mark in the first (upper) line cannot be zero (0).
Credit:
(2000@G4G) Jaime Poniachik (1943–2011)
mathematics lateral-thinking
edited Feb 6 at 20:00
Glorfindel
13.8k35084
asked Jan 29 at 8:41
yunzenyunzen
43611
$endgroup$
$begingroup$
Are rot13(artngvir qvtvgf) allowed?
$endgroup$
– Rand al'Thor
Jan 29 at 9:09
$begingroup$
@Randal'Thor No, they are not
$endgroup$
– yunzen
Jan 29 at 9:09
add a comment |
$begingroup$
? ?
+ ?
-----
?
Replace every question mark (?) in this addition with a single digit so that the addition is valid and correct. The first (leftmost) question mark in the first (upper) line cannot be zero (0).
Credit:
(2000@G4G) Jaime Poniachik (1943–2011)
mathematics lateral-thinking
edited Feb 6 at 20:00
Glorfindel
13.8k35084
asked Jan 29 at 8:41
yunzenyunzen
43611
$endgroup$
? ?
+ ?
-----
?
Replace every question mark (?) in this addition with a single digit so that the addition is valid and correct. The first (leftmost) question mark in the first (upper) line cannot be zero (0).
Credit:
(2000@G4G) Jaime Poniachik (1943–2011)
mathematics lateral-thinking
mathematics lateral-thinking
edited Feb 6 at 20:00
Glorfindel
13.8k35084
asked Jan 29 at 8:41
yunzenyunzen
43611
edited Feb 6 at 20:00
Glorfindel
13.8k35084
asked Jan 29 at 8:41
yunzenyunzen
43611
edited Feb 6 at 20:00
Glorfindel
13.8k35084
edited Feb 6 at 20:00
Glorfindel
13.8k35084
edited Feb 6 at 20:00
Glorfindel
13.8k35084
13.8k35084
asked Jan 29 at 8:41
yunzenyunzen
43611
asked Jan 29 at 8:41
yunzenyunzen
43611
asked Jan 29 at 8:41
yunzenyunzen
43611
43611
$begingroup$
Are rot13(artngvir qvtvgf) allowed?
$endgroup$
– Rand al'Thor
Jan 29 at 9:09
$begingroup$
@Randal'Thor No, they are not
$endgroup$
– yunzen
Jan 29 at 9:09
add a comment |
$begingroup$
Are rot13(artngvir qvtvgf) allowed?
$endgroup$
– Rand al'Thor
Jan 29 at 9:09
$begingroup$
@Randal'Thor No, they are not
$endgroup$
– yunzen
Jan 29 at 9:09
$begingroup$
Are rot13(artngvir qvtvgf) allowed?
$endgroup$
– Rand al'Thor
Jan 29 at 9:09
$begingroup$
Are rot13(artngvir qvtvgf) allowed?
$endgroup$
– Rand al'Thor
Jan 29 at 9:09
$begingroup$
@Randal'Thor No, they are not
$endgroup$
– yunzen
Jan 29 at 9:09
$begingroup$
@Randal'Thor No, they are not
$endgroup$
– yunzen
Jan 29 at 9:09
add a comment |
3 Answers
3
active
oldest
votes
$begingroup$
Following in @jafe's footsteps:
I V I X X C
+ I + I + X
------ or ----- or ----- etc.
V X C
answered Jan 29 at 9:18
BassBass
29.8k472184
$endgroup$
add a comment |
$begingroup$
One possibility would be using
some other numbering system than Arabic numerals. The word "digit" can be used for other systems as well.
For example,
using rod numerals:
answered Jan 29 at 9:11
jafejafe
21k458211
$endgroup$
$begingroup$
Guvf vf gur evtug nccebnpu. V qba'g xabj, vs ebq ahzrenyf fubhyq pbhag nf n pbeerpg nafjre, ohg vg vf abg gur vagraqrq bar.
$endgroup$
– yunzen
Jan 29 at 9:18
add a comment |
$begingroup$
Mixing bases is the first thing I can think of, e.g.:
$10_2 + 1_2 = 3_{10}$
edited Jan 29 at 19:45
GentlePurpleRain♦
16.9k569136
answered Jan 29 at 8:49
AHKieranAHKieran
5,1261040
$endgroup$
$begingroup$
Interesting approach. rot13(Ab onfr punatr)
$endgroup$
– yunzen
Jan 29 at 9:01
add a comment |
Your Answer
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
Following in @jafe's footsteps:
I V I X X C
+ I + I + X
------ or ----- or ----- etc.
V X C
answered Jan 29 at 9:18
BassBass
29.8k472184
$endgroup$
add a comment |
$begingroup$
Following in @jafe's footsteps:
I V I X X C
+ I + I + X
------ or ----- or ----- etc.
V X C
answered Jan 29 at 9:18
BassBass
29.8k472184
$endgroup$
add a comment |
$begingroup$
Following in @jafe's footsteps:
I V I X X C
+ I + I + X
------ or ----- or ----- etc.
V X C
answered Jan 29 at 9:18
BassBass
29.8k472184
$endgroup$
Following in @jafe's footsteps:
I V I X X C
+ I + I + X
------ or ----- or ----- etc.
V X C
answered Jan 29 at 9:18
BassBass
29.8k472184
answered Jan 29 at 9:18
BassBass
29.8k472184
answered Jan 29 at 9:18
BassBass
29.8k472184
answered Jan 29 at 9:18
BassBass
29.8k472184
29.8k472184
add a comment |
add a comment |
$begingroup$
One possibility would be using
some other numbering system than Arabic numerals. The word "digit" can be used for other systems as well.
For example,
using rod numerals:
answered Jan 29 at 9:11
jafejafe
21k458211
$endgroup$
$begingroup$
Guvf vf gur evtug nccebnpu. V qba'g xabj, vs ebq ahzrenyf fubhyq pbhag nf n pbeerpg nafjre, ohg vg vf abg gur vagraqrq bar.
$endgroup$
– yunzen
Jan 29 at 9:18
add a comment |
$begingroup$
One possibility would be using
some other numbering system than Arabic numerals. The word "digit" can be used for other systems as well.
For example,
using rod numerals:
answered Jan 29 at 9:11
jafejafe
21k458211
$endgroup$
$begingroup$
Guvf vf gur evtug nccebnpu. V qba'g xabj, vs ebq ahzrenyf fubhyq pbhag nf n pbeerpg nafjre, ohg vg vf abg gur vagraqrq bar.
$endgroup$
– yunzen
Jan 29 at 9:18
add a comment |
$begingroup$
One possibility would be using
some other numbering system than Arabic numerals. The word "digit" can be used for other systems as well.
For example,
using rod numerals:
answered Jan 29 at 9:11
jafejafe
21k458211
$endgroup$
One possibility would be using
some other numbering system than Arabic numerals. The word "digit" can be used for other systems as well.
For example,
using rod numerals:
answered Jan 29 at 9:11
jafejafe
21k458211
edited Jan 29 at 9:23
answered Jan 29 at 9:11
jafejafe
21k458211
answered Jan 29 at 9:11
jafejafe
21k458211
answered Jan 29 at 9:11
jafejafe
21k458211
21k458211
$begingroup$
Guvf vf gur evtug nccebnpu. V qba'g xabj, vs ebq ahzrenyf fubhyq pbhag nf n pbeerpg nafjre, ohg vg vf abg gur vagraqrq bar.
$endgroup$
– yunzen
Jan 29 at 9:18
add a comment |
$begingroup$
Guvf vf gur evtug nccebnpu. V qba'g xabj, vs ebq ahzrenyf fubhyq pbhag nf n pbeerpg nafjre, ohg vg vf abg gur vagraqrq bar.
$endgroup$
– yunzen
Jan 29 at 9:18
$begingroup$
Guvf vf gur evtug nccebnpu. V qba'g xabj, vs ebq ahzrenyf fubhyq pbhag nf n pbeerpg nafjre, ohg vg vf abg gur vagraqrq bar.
$endgroup$
– yunzen
Jan 29 at 9:18
$begingroup$
Guvf vf gur evtug nccebnpu. V qba'g xabj, vs ebq ahzrenyf fubhyq pbhag nf n pbeerpg nafjre, ohg vg vf abg gur vagraqrq bar.
$endgroup$
– yunzen
Jan 29 at 9:18
add a comment |
$begingroup$
Mixing bases is the first thing I can think of, e.g.:
$10_2 + 1_2 = 3_{10}$
edited Jan 29 at 19:45
GentlePurpleRain♦
16.9k569136
answered Jan 29 at 8:49
AHKieranAHKieran
5,1261040
$endgroup$
$begingroup$
Interesting approach. rot13(Ab onfr punatr)
$endgroup$
– yunzen
Jan 29 at 9:01
add a comment |
$begingroup$
Mixing bases is the first thing I can think of, e.g.:
$10_2 + 1_2 = 3_{10}$
edited Jan 29 at 19:45
GentlePurpleRain♦
16.9k569136
answered Jan 29 at 8:49
AHKieranAHKieran
5,1261040
$endgroup$
$begingroup$
Interesting approach. rot13(Ab onfr punatr)
$endgroup$
– yunzen
Jan 29 at 9:01
add a comment |
$begingroup$
Mixing bases is the first thing I can think of, e.g.:
$10_2 + 1_2 = 3_{10}$
edited Jan 29 at 19:45
GentlePurpleRain♦
16.9k569136
answered Jan 29 at 8:49
AHKieranAHKieran
5,1261040
$endgroup$
Mixing bases is the first thing I can think of, e.g.:
$10_2 + 1_2 = 3_{10}$
edited Jan 29 at 19:45
GentlePurpleRain♦
16.9k569136
answered Jan 29 at 8:49
AHKieranAHKieran
5,1261040
edited Jan 29 at 19:45
GentlePurpleRain♦
16.9k569136
edited Jan 29 at 19:45
GentlePurpleRain♦
16.9k569136
edited Jan 29 at 19:45
GentlePurpleRain♦
16.9k569136
16.9k569136
answered Jan 29 at 8:49
AHKieranAHKieran
5,1261040
answered Jan 29 at 8:49
AHKieranAHKieran
5,1261040
answered Jan 29 at 8:49
AHKieranAHKieran
5,1261040
5,1261040
$begingroup$
Interesting approach. rot13(Ab onfr punatr)
$endgroup$
– yunzen
Jan 29 at 9:01
add a comment |
$begingroup$
Interesting approach. rot13(Ab onfr punatr)
$endgroup$
– yunzen
Jan 29 at 9:01
$begingroup$
Interesting approach. rot13(Ab onfr punatr)
$endgroup$
– yunzen
Jan 29 at 9:01
$begingroup$
Interesting approach. rot13(Ab onfr punatr)
$endgroup$
– yunzen
Jan 29 at 9:01
add a comment |
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$begingroup$
Are rot13(artngvir qvtvgf) allowed?
$endgroup$
– Rand al'Thor
Jan 29 at 9:09
$begingroup$
@Randal'Thor No, they are not
$endgroup$
– yunzen
Jan 29 at 9:09