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
1503 : 3004
1503 ==>Â $$1503\times2-2$$ = 3006-2 = 3004
871 : 1740
871 ==>Â $$871\times2-2$$ = 1742-2 =Â 1740
? : 142
? ==> $$?\times2-2 =Â 142$$
$$?\times2 = 142+2$$
$$?\times2 = 144$$
? = 72
Hence '72' will come in place of the question mark.
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