If the binary equivalent of the decimal number 53 is 110101, then the binary equivalent of the decimal number 50 is

The decimal number 50 converts to 110010, since 32+16+2 equals 50.

110011 equals 51, one more than the required value.

110001 equals 49, one short of fifty.

110100 equals 52, two above the target.

Comparing with 53 as 110101, dropping the units bit and the 4-value bit gives 50.

Each binary digit represents a power of two, read from the right as 1,2,4,8,16,32.