Question : Directions: Select the number that is related to the third number in the same way as the second number is related to the first number.
12 : 36 :: 18 : ?
Option 1: 64
Option 2: 48
Option 3: 83
Option 4: 81
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Correct Answer: 81
Solution :
Given:
12 : 36 :: 18 : ?
The first number is divided by 2 and the resultant is squared to obtain the next number.
12 : 36→12 ÷ 2 = 6; (6)
2
= 36
Similarly, 18 : ?→18 ÷ 2 = 9; (9)
2
= 81
So, 81 is related to 18. Hence, the fourth option is correct.
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