Binary value of 42 decimal number

Result

42 = 101010

Explained

• 42 / 2 = 21
  0 remainder of division
• 21 / 2 = 10.5
  1 remainder of division
• 10 / 2 = 5
  0 remainder of division
• 5 / 2 = 2.5
  1 remainder of division
• 2 / 2 = 1
  0 remainder of division
• 1 / 2 = 0.5
  1 remainder of division

Read listed remainders in reverse:

42 = 101010