amazon Interview Logical Reasoning Decision Making and Problem Solving

There are 3 bags and all are labeled incorrectly as follow:
Bag1 : Silver
Bag2 : Gold
Bag3 : Silver and Gold.
You need to label all bags correctly by opening just one bag.

Read Solution (Total 3)

open bag marked silver gold it will contain either silver or gold, if it contains silver it is silver only
2 the other bags contains gold or silver gold
3 the gold bag cannot contain gold so it has to be silver gold and originally marked silver contains gold

Silver gold bag contains silver
Gold bag contains silver gold
Silver bag contains gold.
7 years agoHelpfull: Yes(4) No(0)

It have already mention that all bag have labeled in correctly
let consider
bag A-silver
bag B-gold
bag C-gold and silver
if i open bag C ..i:e gold and silver
then i should get somthing else(silver or gold) ....becouse it have already mention that all bag are labeled in correctly
so the rest 2 bag A and B should also cantain wrong item.
So.... If i assume that bag c ....cantain silver.
Then bag A(labeled silver) should cantain gold
and bag b(labeled gold)should cantain gold and silver
becouse it have mention that all bag are labeled incorrectly
9 years agoHelpfull: Yes(3) No(3)
for suppose open bag 3 and assume it contain silver then bag 1 contain gold and bag 2 contain gold and silver because already mention that 3 bags are labeled incorrectly
3 years agoHelpfull: Yes(0) No(0)

amazon Other Question

There are 100 bulbs in a room. 100 strangers have been accumulated in the adjacent room. The first one goes and lights up every bulb. The second one goes and switches off all the even numbered bulbs – second, fourth, sixth... and so on. The third one goes and reverses the current position of every third bulb (third, sixth, ninth… and so on.) i.e. if the bulb is lit, he switches it off and if the bulb is off, he switches it on. All the 100 strangers progresses in the similar fashion.
After the last person has done what he wanted, which bulbs will be lit and which ones will be switched off ? Four people need to cross a dark river at night.They have only one torch and the river is too risky to cross without the tourch. if all people cross simultanoesly then torch light wont be sufficient.Speed of each person of crossing the river is different.cross time for each person is 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the river ?