Number Series
Direction: Directions : What will come in the place of question mark (?) in the following number.
- 7, 9, 16, 25, 41, ?, 107, 173
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As per the details in the question the series is in the form of
First term + Second term = Third term
⇒ 7 + 9 = 16;
Second term + Third term = Fourth term
⇒ 9 + 16 = 25;
Similarly , we can calculate all next terms also.
Correct Option: D
As per the details in the question the series is in the form of
First term + Second term = Third term
⇒ 7 + 9 = 16;
Second term + Third term = Fourth term
⇒ 9 + 16 = 25;
Similarly , we can find all others terms also.
Third term + Fourth term = Fifth term
⇒ 16 + 25 = 41;
Fourth term + Fifth term = Sixth term
⇒ 25 + 41 = ?
∴ ? = 66
Fifth term + Sixth term = Seventh term
⇒ 41 + 66 = 107
Sixth term + Seventh term = Eighth term
⇒ 66 + 107 = 173
Hence , Sixth term = 66
- 2, 11, 38, 197, ? , 1170, 8227, 65806
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As per the details in the question the series is in the form of
First term = 2
Second term = First term × 3 + 5 = 11
Third term = Second term × 4 - 6 = 38
Similarly , we can calculate all next terms also.Correct Option: C
As per the details in the question the series is in the form of
First term = 2
Second term = First term × 3 + 5
⇒ Second term = 2 × 3 + 5 = 11
Third term = Second term × 4 - 6
⇒ Third term = 11 × 3 + 5 = 38
Fourth term = Third term × 5 + 7
⇒ Fourth term = 38 × 5 + 7 = 197 ;
Fifth term = Fourth term × 6 - 8
⇒ Fifth term = 197 × 6 - 8 = ?
∴ ? = 1174
Similarly , we can find all others terms also.
Sixth term = Fifth term × 7 + 9
⇒ Sixth term = 1174 × 7 + 9 = 8227;
Seventh term = Sixth term × 8 - 10
⇒ Sixth term = 1174 × 8 - 10 = 65806
Hence , Fifth term = 1174
- 5, 7, 16, 57, 244, 1245, 7506
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The series is x 1 + (1)2, x 2 + (2)2, x 3 + (3)2, x 4 + (4)2, x 5 + (5)2, x 6 + (6)2.
Correct Option: A
The series is x 1 + (1)2, x 2 + (2)2, x 3 + (3)2, x 4 + (4)2, x 5 + (5)2, x 6 + (6)2.
- 6, 7, 16, 41, 90, 154, 292
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The series + (1)2, + (3)2, + (5)2, + (7)2, + (9)2, + (11)2. Correct answer 171.
Correct Option: E
The series + (1)2, + (3)2, + (5)2, + (7)2, + (9)2, + (11)2. Correct answer 171.
- 3, 5, 13, 43, 176, 891, 5353
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The series is x 1 +2, x 2 + 3, x 3 + 4, x 4 + 5, x 5 +6, x 6 + 7. Correct answer 177
Correct Option: D
The series is x 1 +2, x 2 + 3, x 3 + 4, x 4 + 5, x 5 +6, x 6 + 7. Correct answer 177
