Question : Directions: Study the given pattern carefully and select the number that can replace the question mark (?) in it.
16 | 4 | 4 |
30 | 5 | 15 |
8 | 2 | ? |
(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g., 13 – operations on to 13 such as adding/subtracting/multiplying, etc. 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)
Option 1: 2
Option 2: 8
Option 3: 6
Option 4: 4
Correct Answer: 2
Solution : Given:
16 | 4 | 4 |
30 | 5 | 15 |
8 | 2 | ? |
Here, the number in the second column is multiplied by 3, and then the number of the third column is added to the resultant to obtain the number of the first column.
Like, In the first row, 4 + (4 × 3) = 4 + 12 = 16
And, In the second row, 15 + (5 × 3) = 15 + 15 = 30
Similarly, In the third row, x + (2 × 3) = 8; x + 6 = 8; x = 8 – 6 = 2
So, the missing number is 2. Hence, the first option is correct.
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