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Home ‣ Aptitude ‣ Odd Man Out and Series Comments
- Question
- 39, 52, 78, 117, 169,?,
Options- A. 246
- B. 182
- C. 234
- D. 256
- Correct Answer
- 234
ExplanationSeries pattern
39 + 1 x 13 = 52
52 + 2 x 13 = 78
78 + 3 x 13 = 117
117 + 4 x 13 = 169
169 + 5 x 13 = 234 Should come in place of ? - 1. 12, 24, 72, 144, 432,?,
Options- A. 728
- B. 852
- C. 864
- D. 1296 Discuss
- 2. 600, 125, 30,?, 7.2, 6.44, 6.288
Options- A. 6
- B. 10
- C. 15
- D. 11 Discuss
- 3. 1, 2, 6, 21, 88, 445,?
Options- A. 2230
- B. 2676
- C. 2580
- D. 2670 Discuss
- 4. 50, 60, 75, 97.5,?, 184.275, 267.19875
Options- A. 120.50
- B. 130.50
- C. 131.625
- D. 124.25 Discuss
- 5. 6, 13, 32,?, 130, 221.
Options- A. 75
- B. 69
- C. 100
- D. 85 Discuss
- 6. 41, 40, 36,?, 11
Options- A. 35
- B. 27
- C. 29
- D. 30 Discuss
- 7. Divided 124 into four parts which are in AP such that the product of the first and fourth part is 128 less than the products of the seconds and third part?
Options- A. 17, 25, 37, 45
- B. 19, 27, 35, 43
- C. 21, 29, 33, 41
- D. 15, 23, 39, 47 Discuss
- 8. If 20 divided into four parts which are in AP such that the product of the first and fourth is to the products of the second and third is in the radio 2 : 3?
Options- A. 1, 3, 7, 9
- B. 2, 4, 6, 8
- C. 3, 5, 5, 7
- D. 4, 6, 3, 7 Discuss
- 9. A man saves ? 145000 in ten years. In each year after the first year. he saved ? 2000 more than he did in the proceeding year. How much did he save in the first year?
Options- A. ? 5000
- B. ? 5500
- C. ? 6000
- D. ? 6500 Discuss
- 10. Find the sum to 200 terms of the series. 1 + 4 + 6 + 5 + 11 + 6 + ...?
Options- A. 30200
- B. 29800
- C. 30100
- D. 30500 Discuss
Odd Man Out and Series problems
Search Results
Correct Answer: 864
Explanation:
Series pattern
12 x 2 = 24
24 x 3 = 72
72 x 2 = 144
144 x 3 = 432
432 x 2 = 864
Should come in place of '?'
Correct Answer: 11
Explanation:
Series pattern
600/5 + 5 = 125
125/5 + 5 = 30
30/5 + 5 = 11
Should come in place of '?'
11/5 + 5 = 7.2
7.5/5 + 5 = 6.44
6.44/5 + 5 = 6.288
Correct Answer: 2676
Explanation:
1 x 1 + 1 = 2
2 x 2 + 2 = 6
6 x 3 + 3 = 21
21 x 4 + 4 = 88
88 x 5 + 5 = 445
445 x 6 + 6 = 2676 Should come in place of '?'
Correct Answer: 131.625
Explanation:
Series pattern
50 x 1.2 = 60,
60 x 1.25 = 75,
75 x 1.3 = 97.5,
97.5 x 1.35 = 131.625 Should come in place of '?'
131.625 x 1.4 = 184.275
184.275 x 1.45 = 267.19875
Correct Answer: 69
Explanation:
Series pattern
13 + 5, 23 + 5, 33 + 5, 43 + 5, 53 + 5
? Missing term = 43 + 5 = 69
Correct Answer: 27
Explanation:
Series Pattern
(-1)2, (-2)2, (-3)2, (-4)2
Missing term = 36 - 32 = 27
Correct Answer: 19, 27, 35, 43
Explanation:
Let the four parts be (a - 3d), (a - d), (a + d) and (a + 3d).
(a - 3d) + (a - d) + (a +d ) + (a + 3d) = 124
? a = 31
Also, (a - 3d) (a + 3d) = (a - d) (a + d) - 128
? a2 - 9d2 = a2 - d2 - 128
? 8d2 = 128
? d = 4
a = 31, d = 4
So, the four parts are 19, 27, 35, 43.
Correct Answer: 2, 4, 6, 8
Explanation:
Let the four parts be (a - 3d), (a - d), (a +d), (a + 3d).
From question,
(a -3d) + (a - d) + (a + b) + (a + 3d) = 20
? a = 5
Also, [(a - 3d) (a +3d)] / [(a - d) (a + d)] = 2/3
? [a2 - 9d2] / [a2 - d2] = 2/3
? [52 - 9d2] / [52 - d2] = 2/3
? d = 1
? a = 5, d = 1
So, the four parts are 2, 4, 6, 8
Correct Answer: ? 5500
Explanation:
Let the man first save ? P in the first year.
Then, the given sequence is P + (P + 2000) + (P + 4000) + ..,
which is an AP with a = P , d = (P + 2000) - P = 2000,
n = 10, Sn = 145000
Sn = n/2[2a + (n - 1)d]
? 145000 = 10/2 [2 x P + 9 x 2000] = 5 [2P + 18000]
? 2P + 18000 = 145000/5 = 29000
? 2P = 29000 - 18000
? 2P = 11000
? P = ? 5500
So, the man save ? 5500 in the first year .
Correct Answer: 30200
Explanation:
Here, the 1st AP is (1 + 6 + 11 + ...)
and 2nd AP is (4 + 5 + 6 + ...)
1st AP = (1 + 6 + 11 + ..)
Here , common difference = 5 and the number of terms = 100
? Sum of series = S1 = n/2[2a + (n - 1)d]
= 100/2 [2 x 1 + (100 - 1) x 5 ]
= 50[2 + 99 x 5 ]
= 50 x 497
= 24850
2nd AP = (4 +5 + 6 + ...)
Here, common difference = 1
and number of terms = 100
S2 = 100/2[2 x 4 + 99 x 1]
= 50 x 107 = 5350
? Sum of the given series
= S1 + S2 = 24850 + 5350
= 30200
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