Number Series problems
- 1. Look at this series: 1.5, 2.3, 3.1, 3.9, ... What number should come next?
Options- A. 4.2
- B. 4.4
- C. 4.7
- D. 5.1 Discuss
Correct Answer: 4.7
Explanation:
In this simple addition series, each number increases by 0.8.
- 2. Look at this series: 14, 28, 20, 40, 32, 64, ... What number should come next?
Options- A. 52
- B. 56
- C. 96
- D. 128 Discuss
Correct Answer: 56
Explanation:
This is an alternating multiplication and subtracting series: First, multiply by 2 and then subtract 8.
- 3. Look at this series: 2, 4, 6, 8, 10, ... What number should come next?
Options- A. 11
- B. 12
- C. 13
- D. 14 Discuss
Correct Answer: 12
Explanation:
This is a simple addition series. Each number increases by 2.
- 4. Look at this series: 201, 202, 204, 207, ... What number should come next?
Options- A. 205
- B. 208
- C. 210
- D. 211 Discuss
Correct Answer: 211
Explanation:
In this addition series, 1 is added to the first number; 2 is added to the second number; 3 is added to the third number; 4 is added to the fourth number; and go on.
- 5. Look at this series: 544, 509, 474, 439, ... What number should come next?
Options- A. 404
- B. 414
- C. 420
- D. 445 Discuss
Correct Answer: 404
Explanation:
This is a simple subtraction series. Each number is 35 less than the previous number.
- 6. Look at this series: 80, 10, 70, 15, 60, ... What number should come next?
Options- A. 20
- B. 25
- C. 30
- D. 50 Discuss
Correct Answer: 20
Explanation:
This is an alternating addition and subtraction series. In the first pattern, 10 is subtracted from each number to arrive at the next. In the second, 5 is added to each number to arrive at the next.
- 7. Look at this series: 2, 6, 18, 54, ... What number should come next?
Options- A. 108
- B. 148
- C. 162
- D. 216 Discuss
Correct Answer: 162
Explanation:
This is a simple multiplication series. Each number is 3 times more than the previous number.
- 8. Look at this series: 5.2, 4.8, 4.4, 4, ... What number should come next?
Options- A. 3
- B. 3.3
- C. 3.5
- D. 3.6 Discuss
Correct Answer: 3.6
Explanation:
In this simple subtraction series, each number decreases by 0.4.
- 9. Look at this series: 8, 6, 9, 23, 87 , ... What number should come next?
Options- A. 128
- B. 226
- C. 324
- D. 429 Discuss
Correct Answer: 429
Explanation:
8 x 1 - 2 = 6
6 x 2 - 3 = 9
9 x 3 - 4 = 23
23 x 4 - 5 = 87
87 x 5 - 6 = 429 ...
6 x 2 - 3 = 9
9 x 3 - 4 = 23
23 x 4 - 5 = 87
87 x 5 - 6 = 429 ...
- 10. 28 25 5 21 18 5 14
Options- A. 11 5
- B. 10 7
- C. 11 8
- D. 5 10
- E. 10 5 Discuss
Correct Answer: 11 5
Explanation:
This is an alternating subtraction series with the interpolation of a random number, 5, as every third number. In the subtraction series, 3 is subtracted, then 4, then 3, and so on.
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