Logical Questions

Answers are declared !
1. Look at this series: 7, 10, 8, 11, 9, 12, ... What number should come next?

1. 7
2. 10
3. 12
4. 13

Answer: Option B
Explanation:
This is a simple alternating addition and subtraction series. In the first pattern, 3 is added; in the second, 2 is subtracted.

2.Look at this series: 36, 34, 30, 28, 24, ... What number should come next?

1. 20
2. 22
3. 23
4. 26

Answer: Option B
Explanation:
This is an alternating number subtraction series. First, 2 is subtracted, then 4, then 2, and so on.

3. Look at this series: 22, 21, 23, 22, 24, 23, ... What number should come next?

1. 22
2. 24
3. 25
4. 26

Answer: Option C
Explanation:
In this simple alternating subtraction and addition series; 1 is subtracted, then 2 is added, and so on.

4. Look at this series: 53, 53, 40, 40, 27, 27, ... What number should come next?

1. 12
2. 14
3. 27
4. 53

Answer: Option B
Explanation:
In this series, each number is repeated, then 13 is subtracted to arrive at the next number.

5. 28,25,5,21,18,5,14

1. 11,5
2. 10,7
3. 11,8
4. 10,5

Answer: Option A
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.

6. 8,11,21,15,18,21,22

1. 25,18
2. 25,21
3. 25,29
4. 24,19

Answer: Option B
Explanation:
This is an alternating addition series, with a random number, 21, interpolated as every third number. The addition series alternates between adding 3 and adding 4. The number 21 appears after each number arrived at by adding 3.

7. 42,40,38,35,33,31,28

1. 25,22
2. 26,23
3. 26,24
4. 25,23

Answer: Option C
Explanation:
This is an alternating subtraction series in which 2 is subtracted twice, then 3 is subtracted once, then 2 is subtracted twice, and so on.

8. Look at this series: F2, __, D8, C16, B32, ... What number should fill the blank?

1. A16
2. G4
3. E4
4. E3

Answer: Option C
Explanation:
The letters decrease by 1; the numbers are multiplied by 2.

9. Look at this series: 664, 332, 340, 170, ____, 89, ... What number should fill the blank?

1. 85
2. 97
3. 109
4. 178

Answer: Option D
Explanation:
This is an alternating division and addition series: First, divide by 2, and then add 8.

10. Look at this series: 70, 71, 76, __, 81, 86, 70, 91, ... What number should fill the blank?

1. 70
2. 71
3. 80
4. 96

Answer: Option A
Explanation:
In this series, 5 is added to the previous number; the number 70 is inserted as every third number.