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Byju's Answer
Standard XII
Mathematics
Sequence
Which number ...
Question
Which number will replace the '?'
7,13,?,25,31.
A
19
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B
20
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C
21
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D
22
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Solution
The correct option is
D
19
Clearly, the series is of pattern
x
,
x
+
6
and so on.
∴
7
,
7
+
6
=
13
,
13
+
6
=
19
,
19
+
6
=
25
,
25
+
6
=
31.
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