Question 40

Select the option that is related to the sixth number in the same way as the first number is related to the second number and the third number is related to the fourth number.
1503 : 3004 :: 871 : 1740 :: ? : 142

Solution

1503 : 3004

1503 ==> $$1503\times2-2$$ = 3006-2 = 3004

871 : 1740

871 ==> $$871\times2-2$$ = 1742-2 = 1740

? : 142

? ==> $$?\times2-2 = 142$$

$$?\times2 = 142+2$$

$$?\times2 = 144$$

? = 72

Hence '72' will come in place of the question mark.

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Select the option that is related to the sixth number in the same way as the first number is related to the second number and the third number is related to the fourth number.1503 : 3004 :: 871 : 1740 :: ? : 142