Directions (1-5): In the following number series only one number is wrong. Find out the wrongnumber.
1. 529 841 961 1296 1521 2025 2209
(1) 1296 (2) 841
(3) 961 (4) 1521
(5) None of these
2. 13 24 27 48 39 72 52
(1) 27 (2) 72
(3) 48 (4) 39
(5) 24
3. 2197 3375 4913 6858 9261 12167
(1) 2197 (2) 3375
(3) 4913 (4) 6858
(5) 9261
4. 154 462 231 694 346.5 1039.5 519.75
(1) 154 (2) 694
(3) 346.5 (4) 462
(5) 231
5. 9 16 25 41 68 107 173
(1) 9 (2) 16
(3) 41 (4) 68
(5) 107
Directions (6-10): What should come in the place of question mark (?) in the following questions?
6. (35423 + 7164 + 41720) – 317 x 89 = ?
(1) 28213 (2) 84307
(3) 56094 (4) 54096
(5) None of these
7. 43% of 600+?% of 300=399
(1) 45 (2) 41
(3) 42 (4) 47
(5) None of these
8. (256)9.4 × 412.8 × (64)8.1 = 4? (1) 41.8 (2) 66.2
(3) 78.4 (4) 25.6
(5) None of these
9. 15 : 66 : : 185 : ? (1) 824 (2) 644
(3) 604 (4) 814
(5) None of these
10. 410 x 64 ÷ 256 = 4? x 16
(1) 6 (2) 5
(3) 8 (4) 4
(5) None of these
Answers with Explanations (1-5):
1. (1): 232= 529
23 + 6 = 292 = 841
29 + 2 = 312 = 961
36 + 6 = 372 = 1369
37 + 2 = 392 = 1521
39 + 6 = 452 = 2025
45 + 2 = 472 = 2209
So wrong is 1296
2. (1): There are two series running simultaneously –
I. 13 27 39 52
II. 24 48 72
13 –26 – 39 – 52
24 – 48 – 72 -
So 27 is wrong.
3. (4):2197 3375 4913 6858 9261 12167
Series of cube –
133 = 2197
153 = 3375
173 = 4913
193 = 6859
213= 9261
233= 12167
So wrong is 6858
4. (2):154 462 231 694 346.5 1039.5 519.75
154 × 3 = 462
462 ÷ 2 = 231
231 x 3 = 693
693 ÷2 = 346.5
346.5 × 3 = 1039.5
1039.5÷ 2 = 519.75
So wrong is 694
5. (4):9 16 25 41 68 107 173
9 + 16 = 25
25 + 16 = 41
41 + 25 = 66
66 + 41 = 107
107 + 66 = 173
So wrong is 68
Answers (6-10):
6. (3) 7.(4) 8. (3) 9. (4) 10. (5)
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