Convert (20)10 to binary

Answer 1

20 / 2 = 10 , Remainder 0

10 / 2 = 5 , Remainder 0

5 / 2 = 2 , Remainder 1

2 / 2 = 1 , Remainder 0

1 / 2 = 0 , Remainder 1

Write the remainder from bottom to top ( in the reverse order )
20₁₀ = 10100₂