CTS Company Verbal Ability Spotting Errors

You are given eight jelly doughnuts. The doughnuts all weigh the same amount except for one which is heavier. You have a balancing scale at your disposal. What's the minimum number of weighing required for you to pick out the heavy doughnut every time?

Read Solution (Total 2)

1st - divide 8 into 2 group and choose the heavier group
2nd - divide it into half
and choose heavier group from those 2 group
3rd - divide it into 1 and 1 so tis will be last

ans -3
11 years agoHelpfull: Yes(8) No(2)

Well, then it must be 2. So here's my thought:

First weigh 3 and 3 -- if they are the same, then one of the other two is the culprit. Compare them.

If they are not the same, then you know it's one of those three. Weigh one against a second. If they are the same, then the third is the heavier one. If they are not, then the heavier one is the one.
10 years agoHelpfull: Yes(8) No(1)

CTS Other Question

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