UPSC NDA Math Model Paper 3

Here, we have to find the decimal equivalent of the binary number 110110
⇒20×0+21×1+22×1+23×0 +24×1+25×1
=0+2+4+0+16+32=54
So, the decimal equivalent of the binary number 110110 is (54)10
Hence, option D is the correct answer.