• Views : 40k+
  • Sol Viewed : 10k+

Mind Teasers : What number should replace the question mark

Difficulty Popularity

Which number replaces the question mark in the picture below ?

Discussion
Suggestions
  • Views : 70k+
  • Sol Viewed : 20k+

Mind Teasers : Unsolvable Problem

Difficulty Popularity

In a contest, four fruits (an apple, a banana, an orange, and a pear) have been placed in four closed boxes (one fruit per box). People may guess which fruit is in which box. 123 people participate in the contest. When the boxes are opened, it turns out that 43 people have guessed none of the fruits correctly, 39 people have guessed one fruit correctly, and 31 people have guessed two fruits correctly.
How many people have guessed three fruits correctly, and how many people have guessed four fruits correctly

  • Views : 80k+
  • Sol Viewed : 20k+

Mind Teasers : Hard Logical Puzzle

Difficulty Popularity

You are the ruler of a medieval empire and you are about to have a celebration tomorrow. The celebration is the most important party you have ever hosted. You've got 1000 bottles of wine you were planning to open for the celebration, but you find out that one of them is poisoned.

The poison exhibits no symptoms until death. Death occurs within ten to twenty hours after consuming even the minutest amount of poison.

You have over a thousand slaves at your disposal and just under 24 hours to determine which single bottle is poisoned.

You have a handful of prisoners about to be executed, and it would mar your celebration to have anyone else killed.

What is the smallest number of prisoners you must have to drink from the bottles to be absolutely sure to find the poisoned bottle within 24 hours?

  • Views : 60k+
  • Sol Viewed : 20k+

Mind Teasers : Toughest Number Series Question

Difficulty Popularity

Solve the number series by identifying the last number.

1 4 5 6 7 9 11 ?

  • Views : 40k+
  • Sol Viewed : 10k+

Mind Teasers : Draw Direction Problem

Difficulty Popularity

B is to the North-East of D; A is to the North-East of C; C is to the West of D; E is to the South-West of D and to the South of C; and A is to the north of D and in line with B.

Can you find out in which direction of E is B located?

  • Views : 50k+
  • Sol Viewed : 20k+

Mind Teasers : Weight Balance Riddle

Difficulty Popularity

You can place weights on both side of weighing balance and you need to measure all weights between 1 and 1000. For example if you have weights 1 and 3,now you can measure 1,3 and 4 like earlier case, and also you can measure 2,by placing 3 on one side and 1 on the side which contain the substance to be weighed. So question again is how many minimum weights and of what denominations you need to measure all weights from 1kg to 1000kg.

  • Views : 70k+
  • Sol Viewed : 20k+

Mind Teasers : Trick Missing Pound Riddle

Difficulty Popularity

I am a book lover and i saw a book for Pound 97.
I am short of money , so i borrowed Pound 50 from my sister and 50 from my brother = Pound 100.
I bought the book, and had Pound 3 change. I gave brother Pound 1 and my sister Pound 1 and kept the other Pound 1 for myself. Now I owe my mum Pound 49 and my brother Pound 49. 49+49 = 98 + my Pound 1 = 99.

Where is the missing Pound ?

  • Views : 80k+
  • Sol Viewed : 20k+

Mind Teasers : Best Maths Brain Teaser

Difficulty Popularity

A competitive exam was held in which five students took part namely Billy, Gerry, Clark, Peeta and Jonathan. In this exam, they had to answer five questions each out of which, three had multiple choices as a, b or c and two were simple true and false questions. The five of them gave different answers to the questions and the details are as given below.

Name 1 2 3 4 5

Gerry c b True True False

Billy c c True True True

Clark a c False True True

Peeta b a True True False

Jonathan a b True False True

None of the two students gave the same number of correct answers. Can you find out the correct answers to the question? Also, calculate the individual score of all the five guys.

  • Views : 80k+
  • Sol Viewed : 20k+

Mind Teasers : Logical Bank Brain Teaser

Difficulty Popularity

A bank customer had Rs.100 in his account. He then made 6 withdrawals, totaling Rs.. He kept a record of these withdrawals, and the balance remaining in the account, as follows:

Withdrawals Balance left
Rs.50 Rs.50
Rs.25 Rs.25
Rs.10 Rs.15
Rs.8 Rs.7
Rs.5 Rs.2
Rs.2 Rs.0
Rs.100 Rs.99


Why are the Totals not exactly right ?

  • Views : 60k+
  • Sol Viewed : 20k+

Mind Teasers : Popular Logical Riddle

Difficulty Popularity

A mules travels the same distance daily.
I noticed that two of his legs travels 10km and the remaining two travels 12km.
Obviously two mules legs cannot be a 2km ahead of the other 2.

The mules is perfectly normal. So how come this be true ?

By Admin
  • Views : 60k+
  • Sol Viewed : 20k+

Mind Teasers : Accelerating Train Logic Riddle

Difficulty Popularity

I sit on Japan's latest maglev bullet train from its first station. The train starts and is now accelerating and is about to enter the tunnel. What is the best position for me to sit, considering I am a claustrophobic guy?

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