Question : Directions: In the following question, select the number that can be placed at the sign of the question mark (?) from the given alternatives.
| 4 | 5 | 8 |
| 3 | 12 | ? |
| 5 | 13 | 17 |
Option 1: 15
Option 2: 12
Option 3: 13
Option 4: 9
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Correct Answer: 15
Solution : Subtract the square of the number of row three from the square of row one and then find the square root of the resultant to get the number in the second row.
In column one:
(5)
2
– (4)
2
= 25 – 16 = 9; √(9) = 3
In column two:
(13)
2
– (5)
2
= 169 – 25 = 144; √(144) = 12
In column three:
(17)
2
– (8)
2
= 289 – 64 = 225; √(225) = 15
So, 15 is the missing number. Hence, the first option is correct.
Related Questions
Question : Directions: In the following question, select the number which can be placed at the sign of the question mark (?) from the given alternatives.
| 3 | 4 | 1 |
| 2 | 5 | 6 |
| 7 | 2 | 8 |
| 13 | 22 | ? |
Option 1: 12
Option 2: 13
Option 3: 14
Option 4: 16
Question : Directions: In the following question, select the number which can be placed at the sign of the question mark (?) from the given alternatives.
| 5 | 4 | 3 |
| 8 | 7 | 1 |
| 6 | 2 | 9 |
| 38 | 15 | ? |
Option 1: 16
Option 2: 12
Option 3: 28
Option 4: 13
Question : Directions: In the following question, select the missing number from the given responses.
| 1 | 4 | 9 | 16 |
| 1 | 2 | 3 | 4 |
| 2 | 4 | 6 | ? |
Option 1: 7
Option 2: 5
Option 3: 4
Option 4: 8
Question : Directions: Find the missing number from the given responses.
| 2 | 7 | 14 |
| 3 | 4 | 5 |
| 75 | 165 | ? |
Option 1: 185
Option 2: 285
Option 3: 165
Option 4: 425
Question : Directions: In the following question, select the number that can be placed at the sign of the question mark (?) from the given alternatives.
| 2 | 7 | 6 | 20 |
| 2 | 4 | 3 | 14 |
| 5 | 8 | 7 | ? |
Option 1: 20
Option 2: 25
Option 3: 27
Option 4: 30
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