Question : Directions: Select the option that is related to the third term in the same way as the second term is related to the first term and the sixth term is related to the fifth term.
4 : 128 :: 5 : ? :: 7 : 686
Option 1: 225
Option 2: 240
Option 3: 255
Option 4: 250
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Correct Answer: 250
Solution :
Given:
4 : 128 :: 5 : ? :: 7 : 686
Here, multiply the cube of the first number by 2 to get the second number –
Like in, 4 : 128→4
3
× 2 = 128
And in, 7 : 686 →7
3
× 2 = 686
Similarly by following the same method for 5 : ?→5
3
× 2 = 250
So, the required missing number is 250. Hence, the fourth option is correct.
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