8x2100 + 4x2101 = ?
a. 2101
b. 2102
c. 2103
d. 2104
Sol: 8 x 2100 + 4 x 2101
We can write 8 = 23 & 4 = 22
Now, 8 x 2100 + 4 x 2101 = 23 x 2100 + 22 x 2101
= 2103 + 2103
= 2103 (1+1)
= 2103x 2
= 2104
Hence option D is the correct answer.
We can write 8 = 23 & 4 = 22
Now, 8 x 2100 + 4 x 2101 = 23 x 2100 + 22 x 2101
= 2103 + 2103
= 2103 (1+1)
= 2103x 2
= 2104
Hence option D is the correct answer.