If ‘+’ means ‘×’, ‘−’ means ‘÷’, ‘×’ means ‘−’, and ‘÷’ means ‘+’, what will come in place of the question mark (?) in the following equation?
4 × 5 + 3 ÷ 16 − 1 =?
Three resistors of 12 ohm, 16 ohm and 48 ohm are connected in parallel. What is the net resistance?