Home Quantitative Aptitude Number Series Number Series-Test 9

Number Series-Test 9

Number Series

Online exam in Number Series For Quantitative Aptitude for Competitive exams like IBPS BANK PO/Clerical,SBI,RRB,SSC,LIC,UPSC-CSAT,SCRA.MAT,CMAT,MBA,SNAP,CAT,NTSE,CLAT

Number Series-Test 9

Subject :- Quantitative Aptitude

Chapter :- Number Series-Test 9

Questions :- 25

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Question 1 of 25

1. Question
1 points
5 33 225 1345 6724 26881
- 225
- 6724
- 26881
- 33
- 225
Correct

The series is 5 x 8 – 7 = 33, 33 x 7 – 6 = 225, 225 x 6 – 5 = 1345, 1345 x 5 – 4 = 6721,
6721 x 4 – 3 = 26881,
Therefore, there should be 6721 in place of 6724.

Incorrect

The series is 5 x 8 – 7 = 33, 33 x 7 – 6 = 225, 225 x 6 – 5 = 1345, 1345 x 5 – 4 = 6721,
6721 x 4 – 3 = 26881,
Therefore, there should be 6721 in place of 6724.
Question 2 of 25

2. Question
1 points
225 256 289 344 361 400
- 225
- 361
- 344
- 256
- 400
Correct

The series is
${(15)}^{2} = 225, {(16)}^{2} = 256, {(17)}^{2} = 289, {(18)}^{2} = 324, {(19)}^{2} = 361, {(20)}^{2} = 400$
Therefore there should be 324 in place of 344.

Incorrect

The series is
${(15)}^{2} = 225, {(16)}^{2} = 256, {(17)}^{2} = 289, {(18)}^{2} = 324, {(19)}^{2} = 361, {(20)}^{2} = 400$
Therefore there should be 324 in place of 344.
Question 3 of 25

3. Question
1 points
11, 12, 26, 81, 320, 1645
- 11
- 12
- 81
- 320
- None of these
Correct

The series is
11*1 + 1 = 12
12*2 + 2 = 26
26*3 + 3 = 81

81*4 + 4 = 328
328*5 + 5 = 1645
so 320 is wrong

Incorrect

The series is
11*1 + 1 = 12
12*2 + 2 = 26
26*3 + 3 = 81

81*4 + 4 = 328
328*5 + 5 = 1645
so 320 is wrong
Question 4 of 25

4. Question
1 points
9, 26, 65, 126, 217, 342
- 9
- 126
- 26
- 342
- None of these
Correct

Here the number follows the given rule
$2^{3} + 1, 3^{3} - 1, 4^{3} + 1, 5^{3} - 1, 6^{3} + 1, 7^{3} - 1$
so 126 is wrong number.

Incorrect

Here the number follows the given rule
$2^{3} + 1, 3^{3} - 1, 4^{3} + 1, 5^{3} - 1, 6^{3} + 1, 7^{3} - 1$
so 126 is wrong number.
Question 5 of 25

5. Question
1 points
18, 10, 11, 17.5, 40, 91, 274
- 18
- 11
- 10
- 40
- None of these
Correct

Wrong Number: 40
Correct Number: 37
18 * 0.5 + 1 = 10
10 * 1 + 1 = 11
11 * 1.5 + 1 = 17.5
17.5 * 2 + 1 = 36
36 * 2.5 + 1 = 91
91 * 3 + 1 = 274

Incorrect

Wrong Number: 40
Correct Number: 37
18 * 0.5 + 1 = 10
10 * 1 + 1 = 11
11 * 1.5 + 1 = 17.5
17.5 * 2 + 1 = 36
36 * 2.5 + 1 = 91
91 * 3 + 1 = 274
Question 6 of 25

6. Question
1 points
12, 30, 99, 408, 2050, 12348
- 12
- 30
- 2050
- 408
- None of these
Correct

(9×1) + 3 = 12
(12×2) + 6 = 30
(30×3) + 9 = 99
(99×4) + 12 = 408
(408×5) + 15 = 2055
(2055×6) + 18 = 12348

Incorrect

(9×1) + 3 = 12
(12×2) + 6 = 30
(30×3) + 9 = 99
(99×4) + 12 = 408
(408×5) + 15 = 2055
(2055×6) + 18 = 12348
Question 7 of 25

7. Question
1 points
50, 51, 47, 56, 45, 65, 29
- 45
- 50
- 29
- 65
- None of these
Correct

50 + 1Λ2 (1) = 51
51 – 2Λ2 (4) = 47
47 + 3Λ2 (9) = 56
56 – 4Λ2 (16) = 40
40 + 5Λ2 (25) = 65
65 – 6Λ2 (36) = 29

Incorrect

50 + 1Λ2 (1) = 51
51 – 2Λ2 (4) = 47
47 + 3Λ2 (9) = 56
56 – 4Λ2 (16) = 40
40 + 5Λ2 (25) = 65
65 – 6Λ2 (36) = 29
Question 8 of 25

8. Question
1 points
190 166 145 128 112 100 91
- 100
- 91
- 128
- 112
- 145
Correct

Subtracting 24, 21, 18, 15, 12.

Incorrect

Subtracting 24, 21, 18, 15, 12.
Question 9 of 25

9. Question
1 points
20480 5120 1280 320 100 20 5
- 5120
- 320
- 1280
- 100
- 5
Correct

Dividing previous number by 4.

Incorrect

Dividing previous number by 4.
Question 10 of 25

10. Question
1 points
60 67 76 87 99 115
- 67
- 87
- 76
- 115
- 99
Correct

Go on adding 7, 9, 11, 13, 15, …

Incorrect

Go on adding 7, 9, 11, 13, 15, …
Question 11 of 25

11. Question
1 points
7 8 18 57 228 1165 6996
- 228
- 57
- 1165
- 8
- 18
Correct

The series is:
7 × 1 + 1 = 8
8 × 2 + 2 = 18

18 × 3 + 3= 57
57 × 4 + 4 = 232 not 228
232 × 5 + 5 = 1165
1165 × 6 + 6 = 6996
228 is wrong.

Incorrect

The series is:
7 × 1 + 1 = 8
8 × 2 + 2 = 18

18 × 3 + 3= 57
57 × 4 + 4 = 232 not 228
232 × 5 + 5 = 1165
1165 × 6 + 6 = 6996
228 is wrong.
Question 12 of 25

12. Question
1 points
1 1 2 6 24 96 720
- 720
- 96
- 24
- 6
- 2
Correct

The series is:
1 × 1 = 1
1 × 2 = 2
2 × 3 = 6
6 × 4 = 24
24 × 5 = 120 not 96
120 × 6= 720
96 is wrong

Incorrect

The series is:
1 × 1 = 1
1 × 2 = 2
2 × 3 = 6
6 × 4 = 24
24 × 5 = 120 not 96
120 × 6= 720
96 is wrong
Question 13 of 25

13. Question
1 points
2 12 36 81 150 252
- 2
- 81
- 36
- 150
- 252
Correct

The series is
$1^{2} x 2 = 2, 2^{2} x 3 = 12, 3^{2} x 4 = 36, 4^{2} x 5 = 80, 5^{2} x 6 = 150, 6^{2} x 7 = 252$
Hence, 81 should be replaced by 80.

Incorrect

The series is
$1^{2} x 2 = 2, 2^{2} x 3 = 12, 3^{2} x 4 = 36, 4^{2} x 5 = 80, 5^{2} x 6 = 150, 6^{2} x 7 = 252$
Hence, 81 should be replaced by 80.
Question 14 of 25

14. Question
1 points
5 16 27 44 65 90
- 16
- 5
- 44
- 65
- 90
Correct

The series is 1 x (2 + 3) = 5, 2 x (3 + 4) = 14,3 x (4 + 5)=27,4 x(5 +6)=44,5 x(6 + 7)=65,6x(7 + 8) = 90.
Hence, 16 should be replaced by 14.

Incorrect

The series is 1 x (2 + 3) = 5, 2 x (3 + 4) = 14,3 x (4 + 5)=27,4 x(5 +6)=44,5 x(6 + 7)=65,6x(7 + 8) = 90.
Hence, 16 should be replaced by 14.
Question 15 of 25

15. Question
1 points
4 2 0 -5 -12 -21
- 0
- 4
- 2
- -5
- -21
Correct

The Series is
$3^{2} - 2^{2} - 1^{2} = 4, 4^{2} - 3^{2} - 2^{2} = 3, 5^{2} - 4^{2} - 3^{2} = 0; 6^{2} - 5^{2} - 4^{2} = - 5; 7^{2} - 6^{2} - 5^{2} = 12, 8^{2} - 7^{2} - 6^{2} = - 21 .$
Hence, 2 should be replaced by 3.

Incorrect

The Series is
$3^{2} - 2^{2} - 1^{2} = 4, 4^{2} - 3^{2} - 2^{2} = 3, 5^{2} - 4^{2} - 3^{2} = 0; 6^{2} - 5^{2} - 4^{2} = - 5; 7^{2} - 6^{2} - 5^{2} = 12, 8^{2} - 7^{2} - 6^{2} = - 21 .$
Hence, 2 should be replaced by 3.
Question 16 of 25

16. Question
1 points
101 123 149 179 218 251
- 251
- 123
- 179
- 218
- 101
Correct

The series is
$10^{2} + 1^{2} + 0^{2} = 101,$ $11^{2} + 1^{2} + 1^{2} = 123,$ $13^{2} + 1^{2} + 2^{2} = 179,$ $14^{2} + 1^{2} + 4^{2} = 213,$ $15^{2} + 1^{2} + 5^{2} = 251$
Hence, 218 should be replaced by 213.

Incorrect

The series is
$10^{2} + 1^{2} + 0^{2} = 101,$ $11^{2} + 1^{2} + 1^{2} = 123,$ $13^{2} + 1^{2} + 2^{2} = 179,$ $14^{2} + 1^{2} + 4^{2} = 213,$ $15^{2} + 1^{2} + 5^{2} = 251$
Hence, 218 should be replaced by 213.
Question 17 of 25

17. Question
1 points
9 21 45 101 211 433 879
- 21
- 45
- 211
- 433
- 101
Correct

Theseriesis x2+3, x2+5, x2+7, x2+9, x2+11…
Hence, 45 should be replaced by 47.

Incorrect

Theseriesis x2+3, x2+5, x2+7, x2+9, x2+11…
Hence, 45 should be replaced by 47.
Question 18 of 25

18. Question
1 points
2 11 38 197 1172 8227 65806
- 11
- 38
- 197
- 1172
- 8227
Correct

The series is based on the following pattern:
11 = 2 × 3 + 5
38 = 11 × 4 – 6
197 = 38 × 5 + 7
1172 ≠ 197 × 6 – 8
1172 is wrong and it should be replaced by 197 × 6 – 8 = 1174

Incorrect

The series is based on the following pattern:
11 = 2 × 3 + 5
38 = 11 × 4 – 6
197 = 38 × 5 + 7
1172 ≠ 197 × 6 – 8
1172 is wrong and it should be replaced by 197 × 6 – 8 = 1174
Question 19 of 25

19. Question
1 points
16 19 21 30 46 71 107
- 19
- 21
- 30
- 46
- 71
Correct

The series is based on the following pattern:
107 – 71 = 36 =
$6^{2}$
71 – 46 = 25 =
$5^{2}$
46 – 30 = 16 =
$4^{2}$
30 – 21 = 9 =
$3^{2}$
21 – 19 = 2 ≠
$2^{2}$
19 I should be replaced by 17 for which
$21 - 17 = 2^{2}$

Incorrect

The series is based on the following pattern:
107 – 71 = 36 =
$6^{2}$
71 – 46 = 25 =
$5^{2}$
46 – 30 = 16 =
$4^{2}$
30 – 21 = 9 =
$3^{2}$
21 – 19 = 2 ≠
$2^{2}$
19 I should be replaced by 17 for which
$21 - 17 = 2^{2}$
Question 20 of 25

20. Question
1 points
7 9 16 25 41 68 107 173
- 107
- 16
- 41
- 68
- 25
Correct

The series is based on the following pattern:
16 = 9 + 7
25 = 16 + 9
41 = 25 + 16
68 ≠ 41 + 25

Incorrect

The series is based on the following pattern:
16 = 9 + 7
25 = 16 + 9
41 = 25 + 16
68 ≠ 41 + 25
Question 21 of 25

21. Question
1 points
4 2 3.5 7.5 26.25 118.125
- 3.5
- 7.5
- 26.25
- 2
- 4
Correct

Incorrect
Question 22 of 25

22. Question
1 points
7 4 6 9 20 52.5 160.5
- 6
- 4
- 20
- 9
- 52.5
Correct

×1/2+1/2, ×1+1, ×1(1/2)+1(1/2)…..

Incorrect

×1/2+1/2, ×1+1, ×1(1/2)+1(1/2)…..
Question 23 of 25

23. Question
1 points
2 3 6 18 109 1944 209952
- 3
- 6
- 18
- 109
- 1944
Correct

2×3=6; 3×6=18; 6×18=108; 18×108=1944….

Incorrect

2×3=6; 3×6=18; 6×18=108; 18×108=1944….
Question 24 of 25

24. Question
1 points
1 3 6 11 20 39 70
- 3
- 39
- 11
- 20
- 6
Correct

1×2+1=3; 3×2+0=6; 6×2-1=11; 11×2-2=20; 20×2-3=37….

Incorrect

1×2+1=3; 3×2+0=6; 6×2-1=11; 11×2-2=20; 20×2-3=37….
Question 25 of 25

25. Question
1 points
2 13 27 113 561 3369 23581
- 13
- 27
- 113
- 561
- 3369
Correct

2×2+7=11; 11×3-6=27; 27×4+5=113; 113×5-4=561……

Incorrect

2×2+7=11; 11×3-6=27; 27×4+5=113; 113×5-4=561……

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Number Series

Number Series-Test 9

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