Mind Teasers : FAQ Manhole Shapes Riddle

Difficulty Popularity

The manhole covers in Baker Street usually fell inside. However the covers never fell down in Crawford Street.

Why?

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Mind Teasers : Decipher MatchSticks Puzzle

Difficulty Popularity

Can you decipher the two rows to find the hidden word?

Mind Teasers : Nice Mathematics Riddle

Difficulty Popularity

Aishwarya Rai walks into a bank to cash out her check.
By mistake the bank teller gives her dollar amount in change, and her cent amount in dollars.
On the way home she spends 5 cent, and then suddenly she notices that she has twice the amount of her check.

How much was her check amount ?
category : LOGIC | MATHS

Mind Teasers : Box Ball Logic Problem

Difficulty Popularity

There are three bags.The first bag has two blue rocks. The second bag has two red rocks. The third bag has a blue and a red rock. All bags are labeled but all labels are wrong.You are allowed to open one bag, pick one rock at random, see its color and put it back into the bag, without seeing the color of the other rock.

How many such operations are necessary to correctly label the bags ?
category : LOGIC | TRICK

Mind Teasers : Maths Logical Problem

Difficulty Popularity

The digits 0-9(0,1,2,3,4,5,6,7,8,9) can be rearranged into 3628800 distinct 10 digits numbers.

How many of these numbers are prime ?

Mind Teasers : Trick Gift Brain Teaser

Difficulty Popularity

Cindy opened twenty five presents.
Duke opened five presents.
John opened fifteen presents.

Judging by the statements, can you decipher how many presents will be opened by Rhea?
category : LOGIC | TRICK

Mind Teasers : River Crossing Brain Teaser

Difficulty Popularity

River Thames needs to be crossed by Mr. Father, Mrs. Mother, A Thug, A Policeman, 2 dogs and 2 Cats. There is only one boat, which can carry only two people (or a person and an animal or two animals) at a time. Only the humans (excluding the thug) know how to operate the boat. The boat must travel back and forth across the river in order to pick up all of the people and animals.
Following rules must be followed at all times:
Mr. Father: Mr. Father cannot stay with any of the cats, without Mrs. Mother's presence.
Mrs. Mother: Mrs. Mother cannot stay with any of the dogs, without Mr. Father's presence.
Thug: The thug cannot stay with anyone, if the policeman is not there.
Policeman Allowed to travel with everyone.
2 Dogs, 2 Cats: Not allowed to travel without a human, or be in the presence of the thug without the policeman's supervision.
The dogs are not allowed to be in the presence of Mrs. Mother without the supervision of Mr. Father.
Similarly, The cats are not allowed to be in the presence of Mr. Father without the supervision of Mrs. Mother.
Both the dogs and cats are allowed to be unsupervised (provided the other rules are satisfied.)
How will everyone get to the other side of the river Thames? None of the rule can be broken, and all rules apply on the boat as well as on the land.
category : LOGIC

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.
category : LOGIC | MATHS

Mind Teasers : Nine Coins Picture Puzzle

Difficulty Popularity

Nine coins are arranged in a triangle as shown in the picture below. You need to slide two triangles to form a square. Can you do it?


category : LOGIC | PICTURE

Mind Teasers : Logical Arrangement Bonfire Puzzle

Difficulty Popularity

30 classmates went for a bonfire. While sitting around the fire, they decided to play a game. To play it, they divided themselves into 5 teams in a way that there were 5 rows having 7 people each.

How can this arrangement be possible while sitting around the bonfire?
category : LOGIC | TRICK

Mind Teasers : Pattern Age Puzzle

Difficulty Popularity

If neha is 10
Both Sonali and priyanka is 15
Both sadaf and tanu is 10.

how much is prinka by the same system ?
category : LOGIC | CIPHER

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