[{"data":1,"prerenderedAt":30},["ShallowReactive",2],{"options:asyncdata:2j68tttum4281":3},{"state":4,"puzzle":5,"loading":29},"open",{"id":6,"title":7,"category":8,"difficulty":9,"access":10,"tags":11,"prompt":13,"options":14,"hints":27},"three-switches","Three Switches","logic","easy","free",[12],"lateral","Three switches outside a closed room control one bulb inside. You can flip switches as you like, but you may enter the room only once. How do you tell which switch controls the bulb?",[15,18,21,24],{"id":16,"text":17},"a","Turn on switch 1 for a few minutes, turn it off, turn on switch 2, then go in and check the bulb's light and heat.",{"id":19,"text":20},"b","Turn on switches 1 and 2, then go in.",{"id":22,"text":23},"c","Flip all three, then turn them off one by one.",{"id":25,"text":26},"d","It cannot be done with one visit.",[28],"A bulb tells you more than just on or off.",false,1793569846040]