Question : Directions: Select the option 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.
7 : 125 :: 8 : 216 :: 9 : ?
Option 1: 755
Option 2: 824
Option 3: 343
Option 4: 729
Correct Answer: 343
Solution :
Given:
7 : 125 :: 8 : 216 :: 9 : ?
Subtract 2 from the first number, and then find the cube of the resultant, to get the second number –
Like, 7 : 125→7 – 2 = 5; (5)
3
= 125
And, 8 : 216→8 – 2 = 6; (6)
3
= 216
Similarly, follow the same pattern for, 9 : ?→9 – 2 = 7; (7)
3
= 343
So, 343 is related to 9. Hence, the third option is correct.
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