1. Find Missing Letter in the sequence ??aba??ba?ab
1.
??, ab, a
?,
?b, a
?, ab (divide into 2 char
group)
2.
ab, ab, a
b,
ab, a
b, ab (Possible missing value
for 2 char group)
Answer : abbab
2. Find Missing Letter in the sequence ?baa?aab?a?a
1.
?ba, a
?a, ab
?, a
?a (divide into 3 char group)
2.
aba, a
ba, ab
a, a
ba (Possible missing value for 3
char group)
Answer : abab
3. Find Missing Letter in the sequence ab???b?bbaa?
1. ab
???b,
?bbaa
? (divide into 6 char group)
2. ab
baab,
abbaa
b (Possible missing value for
6 char group)
Answer : baaab
4. Find Missing Letter in the sequence ??babbba?a?b
1.
??babb, ba
?a
?b (divide into 6 char group)
2.
bababb, ba
ba
bb (Possible missing value for 6 char
group)
Answer : babb
5. Find Missing Letter in the sequence aa?ab??aaa?a
1. aa
?ab
?,
?aaa
?a (divide into 6 char group)
2. aa
aab
a,
aaaa
ba (Possible missing value for 6 char
group)
Answer : aaab
6. Find Missing Letter in the sequence a?bbc?aab?cca?bbcc
1. a
?bbc
?, aab
?cc, a
?bbcc (divide into 6 char group)
2. a
abbc
c, aab
bcc, a
abbcc (Possible missing value for
6 char group)
Answer : acba
7. Find Missing Letter in the sequence bc?b?c?b?ccb
1. bc
?b,
?c
?b,
?ccb (divide into 4 char group)
2. bc
cb,
bc
cb,
bccb (Possible missing value for 4 char
group)
Answer : cbcb
8. Find Missing Letter in the sequence abb?baa?a?bab?aba
1. abb
?baa
?, a
?bab
?ab, a (divide into 8 char group)
2. abb
abaa
b, a
bbab
aab, a (Possible missing value for
8 char group)
Answer : abba
9. Find Missing Letter in the sequence ab?bc?c?ba?c
1. ab?, bc?, c?b, a?c (divide into 3 char group)
2. ab
c, bc
a, c
ab, a
bc (Possible missing value for 3
char group)
Answer : caab
10. Find Missing Letter in the sequence ab?bbc?c?ab?ab?b
1. ab?b, bc?c, ?ab?, ab?b (divide into 4 char group)
2. ab
cb, bc
ac,
cab
a, ab
cb (Possible missing value
for 4 char group)
Answer : cacac
11. Find Missing Letter in the sequence a?bccb?ca?cca?baab?c
1. a?bcc, b?ca?, cca?b, aab?c (divide into 5 char group)
2. a
abcc, b
bca
a, cca
bb, aab
cc (Possible missing
value for 5 char group)
Answer : ababc
12. Find Missing Letter in the sequence ab?bcbca?ac?bab
1. ab?bc, bca?a, c?bab (divide into 5 char group)
2. ab
cbc, bca
ca, c
abab (Possible missing value for 5 char group)
Answer : cca
13. Find Missing Letter in the sequence a?cacbc?baca??b
1. a?cac, bc?ba, ca??b (divide into 5 char group)
2. a
bcac, bc
aba, ca
bcb (Possible missing value for 5
char group)
Answer : babc
14. Find Missing Letter in the sequence a?ca?bc?bcc?bca
1. a?ca?, bc?bc, c?bca (divide into 5 char group)
2. a
bca
b, bc
abc, c
abca (Possible missing value for 5
char group)
Answer : bbaa
15. Find Missing Letter in the sequence ?bbca?bccabac?a?cb
1. ?bbca?, bccaba, c?a?cb (divide into 6 char group)
2.
abbca
c, bccaba, c
aa
bcb (Possible missing value for
6 char group)
Answer : acab
16. Find Missing Letter in the sequence ?bcc?ac?aabb?ab?cc
1. ?bcc?a, c?aabb, ?ab?cc (divide into 6 char group)
2.
bbcc
aa, c
caabb,
aab
bcc (Possible missing value
for 6 char group)
Answer : bacab
17. Find Missing Letter in the sequence ?acca?ccca?acccc?aaa
1.
?a, cca
?, ccca
?a, cccc
?aaa
2.
ca, cca
a, ccca
aa, cccc
aaaa
Answer : caaa
18. Find Missing Letter in the sequence a?cdaab?cc?daa?bbb?ccddd
1. a
?cd, aab
?cc
?d, aa
?bbb
?ccddd
2. a
bcd, aab
bcc
dd, aa
abbb
cccddd
Answer : bbdac
19. Find Missing Letter in the sequence ?aba?cabc?dcba?b?b?a
Divide into 2 parts. Now first part and reverse of second part are same
1.
?aba
?cabc
?, dcba
?b
?b
?a
2.
aaba
bcabc
d, dcba
cb
ab
aa
Answer : abdcaa
This material is intended as a summary. Use your textbook for detail explanation.
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