Question : Directions: Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is related to the third number.
19 : 324 :: 25 : 576 :: 9 : ?
Option 1: 16
Option 2: 64
Option 3: 88
Option 4: 72
Correct Answer: 64
Solution :
Given:
19 : 324 :: 25 : 576 :: 9 : ?
In the given number pairs, subtract 1 from the first number and then find the square of the resultant, to get the second number.
Like, 19 : 324→(19 – 1)
2
= (18)
2
= 324
And, 25 : 576→(25 – 1)
2
= (24)
2
= 576
Similarly, (9 – 1)
2
= (8)
2
= 64
So, 64 is related to the fifth number in the same way as the other number pairs. Hence, the second option is correct.
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