• Views : 80k+
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Mind Teasers : Numbers For Buildings Problem

Difficulty Popularity

My town contains 100 buildings.
They are numbered from 1 to 100. How many 6's are used in these numbers ?

Discussion
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By Admin
  • Views : 70k+
  • Sol Viewed : 20k+

Mind Teasers : Measure Water Supply Brain Teaser

Difficulty Popularity

You had an infinite supply of water and a 5 ml and 3 ml gallons.

How would you measure exactly 4 ml in least number of steps ?

  • Views : 50k+
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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.

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

Mind Teasers : Spatial Trivia Physics Puzzle

Difficulty Popularity

As shown in picture, there are four gears with the following specification
* Gear A has 60 teeth
* Gear B has 40 teeth
* Gear C has 20 teeth
* Gear D has 60 teeth
* Every minute, Gear B makes 15 complete turns.

What is the relative speed of Gear A and Gear B?

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

Mind Teasers : Logical Marble Riddle

Difficulty Popularity

There is a box which have 33 yellow marbles and 35 green marbles. You also have 34 green marbles outside the box.

Randomly remove two marbles from the box.
* If they are of different colors, put the yellow one back in the box.
* If they are the same color, take them out and put a green marble back in the box.

Repeat this until only one marble remains in the box.


What is the color of the sole marble left in the box ?

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

Mind Teasers : What word am I ?

Difficulty Popularity

What word am I?

Insights:

* I am a nine letter word.

* I am the exact inverse to expression 'neighborly and active'

* I contain the word 'over'.

* I begin will a vowel.

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

Mind Teasers : Shortest Who Am I

Difficulty Popularity

Who am I?

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

Mind Teasers : Measuring Time Logic Puzzle

Difficulty Popularity

You are given with two ropes with variable width. However if we start burning both the ropes, they will burn at exactly same time i.e. an hour. The ropes are non-homogeneous in nature. You are asked to measure 45 minutes by using these two ropes.

How can you do it?

Please note that you can’t break the rope in half as it is being clearly stated that the ropes are non-homogeneous in nature.

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

Mind Teasers : Lateral Thinking Puzzle

Difficulty Popularity

Sachin new ferrari car has five wheels(two front wheels, two Rear wheels and one spare wheel).
Real car Wheel will wear out in exact 21000 miles and front wheel will wear out after exact 29000 miles.

What is the maximum distance sachin can cover.

Note: unlimited numbers of changing the tyres can take place.

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

Mind Teasers : Three Magic Numbers Puzzle

Difficulty Popularity

Find three magic number such that ?

* Product of three numbers is prime.
* 2nd number - 1st number = 3rd number - 2nd number

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

Mind Teasers : Worlds Hardest Brain Teaser

Difficulty Popularity

A mastermind organized a quiz competition in which six selected candidates were invite namely James Hunt, Ruxandra Bar, Sophia Connors, David Finch, Fred Odea and Brian Miller. A 'special puzzle' was asked to all of them. The first one to answer it was promised for a big award.

After that, the candidates were offered the meal before the mastermind stood up to announce the much awaited result. He started announcing:

'Ok now everybody!'
'The winner of…..'
'The Hardest Riddle Ever Event.'

And then he smiled. All the candidates understood who won.

Do you know who won ?

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