If white button represents +1 and black button represents +1. Find the net value of all the buttons shown:
If white buttons represent positive integers and black buttons represent negative integers. Find the net value of all the buttons shown:
Having unlocked the door, Tom proceeded to battle with his combatant. Tom realized that he would need some ammunition [bullets] to counter his opponent. He found a chest full of ammunition which had a display on it. It had four buttons on it, A, B, C and D and on each button, there were some laws [equations which are always true]. The chest would open only if Tom pressed ALL the buttons with a correct law on it.
The laws on each button are given in the options – choose all the correct ones to help Tom open the chest.