top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

There are 8 pills and they are all the same size and colour. One pill weigh slightly more and is poisonous..............

0 votes

There are 8 pills and they are all the same size and colour.
One pill weigh slightly more and is poisonous.
You have a balanced scale and you can only use it twice.
How can you find the poisonous pill?

posted Jan 13, 2020 by Pushpak Chauhan

Share this puzzle
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

0 votes

Separate 8 pills into 3 groups, 3+3+2 pills
1. First weight 3 x 3 pills, if they are equal then go to step 2.1, if one is heavier then got to step 2.2
2.1 Weight 2 pills- heavier one is poisonous
2.2 Weight 1 x 1 pills from heavier group of 3 pills, if one of 2 is heavier, then this is the poisonous one. If they are equal, then the remaining one from the group is poisonous

answer Jan 14, 2020 by Hanifa Mammadov

Similar Puzzles
+1 vote

There is an island with 12 islanders. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11.

enter image description here

You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. There are no scales or other weighing device on the island.

+2 votes

There are 8 numbers spelled out as words in the paragraph below but they are hidden within one or more words.

As an example the word eight could be hidden inside one word, height or between 2 words, like this;

We will ride in a sleigh tonight.

Now find the 8 hidden number words in the paragraph below;

Where has the fat worm gone? He was wriggling away from

my reel even before I had the hook on it! If I’ve lost him, I’ll be

sorry. This evening I came prepared with reel, line and bait hoping

to catch plenty of fish. It’s not often that a worm of ours gets away!

With reel bait in hand, I know I can catch

0 votes

There are nine metal blocks.

1 metal block is slightly lighter than the other 8.

If you have a balance scale find the minimum times will you have to weigh to find the lighter block?

+1 vote

A man works in a fruit and vegetable shop. His shoe size is 8, he is 21 years old, his shirt size is Large and he is 6 feet tall.

What does he weigh?