Question : Directions: Study the given pattern carefully and select the number that can replace the question mark (?) in it.
(5, 19, 4); (1, 7, 4); (6, ?, 1)
(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 - operations on 13 such as adding/subtracting/multiplying etc. to 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: 7
Option 2: 9
Option 3: 19
Option 4: 13
Correct Answer: 19
Solution :
Given:
(5, 19, 4); (1, 7, 4); (6, ?, 1)
In the given sets, add the third number to the thrice of the first number to get the second number.
Like, (5, 19, 4)→(5 × 3) + 4 = 15 + 4 = 19
And, (1, 7, 4)→(1 × 3) + 4 = 3 + 4 = 7
Similarly, for (6, ?, 1)→(6 × 3) + 1 = 18 + 1 = 19
So, 19 is the missing number. Hence, the third option is correct.
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