1) 53 (10) = 110101 (2)
110101 (2) = 1 * 2^0 + 1 * 2 ^2 + 1 * 2 ^4 + 1 * 2 ^ 5 = 1 + 4 + 16 + 32 = 53 (10)
2) 60 (10) = 111100 (2)
111100 (2) = 1 * 2 ^2 + 1 * 2 ^3 + 1 * 2 ^4 + 1 * 2 ^ 5 = 4 + 8 + 16 + 32 = 60 (10)
3) 85 (10) = 1010101 (2)
1010101 (2) = 1 *2 ^ 0 + 1 * 2 ^ 2 + 1 * 2 ^ 4 + 1 * 2 ^ 6 = 1 + 4 + 16 + 64 = 85(10)