Question : Directions: The overall rainfall in certain regions of India decreases year after year. Find out from the data the trend in decrease.
| Year | Rainfall ( in mm ) |
| 2009 | 26 |
| 2010 | 25 |
| 2011 | 23 |
| 2012 | 20 |
| 2013 | 16 |
| 2014 | 11 |
| 2015 | ? |
Option 1: 6 mm
Option 2: 7 mm
Option 3: 5 mm
Option 4: 8 mm
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Correct Answer: 5 mm
Solution :
Given:
The rainfalls are 26, 25, 23, 20, 16, 11, ?
Here, subtract the consecutive natural numbers from each term to get the next term.
26 – 1 = 25; 25 – 2 = 23; 23 – 3 = 20; 20 – 4 = 16; 16 – 5 = 11; 11 – 6 = 5
So, the rainfall in 2015 will be 5 mm. Hence, the third option is correct.
Related Questions
Question : Directions: The population of a village in Madurai is increasing year after year. Find out the population (in lakhs) in 2013 from the following information.
| Year | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 |
| Population | 4 | 7 | 13 | 22 | 34 | ? |
Option 1: 49
Option 2: 46
Option 3: 45
Option 4: 43
Question : Directions: In the following question, select the missing number from the given responses.
| 1 | 3 | 7 |
| 2 | 4 | 4 |
| 4 | 5 | 9 |
| 3 | 2 | 3 |
| 50 | 70 | ? |
Option 1: 23
Option 2: 115
Option 3: 118
Option 4: 220
Question : Directions: In the following question, select the missing number from the given responses.
| 18 | 20 | 8 | ||||||
| 16 | 20 | 18 | 22 | 9 | ? |
Option 1: 6
Option 2: 7
Option 3: 10
Option 4: 11
Question : Directions: In the following question, select the missing number from the given responses.
| 2 | 4 | 5 | 3 | ||
| 3 | 3 | 3 | 6 | ? | 6 |
| 1 | 2 | 1 | 6 |
Option 1: 5
Option 2: 2
Option 3: 3
Option 4: 1
Question : Directions: Find the missing number.
| 3 | 4 | 64 |
| 2 | 3 | 9 |
| 3 | 2 | 8 |
| 9 | 2 | ? |
Option 1: 216
Option 2: 512
Option 3: 128
Option 4: 1024
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