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Mind Teasers : Maths Problem

Difficulty Popularity

A brilliant mathematician told his favorite student if he had four positive number a, b, c, d, there will be six ways to multiply the pairs.
a*c, a*d, b*d and c*d
He told him the result of five products without telling which product s for which pair to be 2, 3, 4, 5 and 6. Then he asked him to tell the remaining product. He was able to tell and make him proud.

Can you?

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  • 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 : 40k+
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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.

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Mind Teasers : Logic Fruits Riddle

Difficulty Popularity

There is a box full of fruits,
all but two are grapes,
all but two are apples,
and all but two are oranges.

How many fruits are in the box ?

By Admin
  • Views : 50k+
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Mind Teasers : 4 + 9 != 13

Difficulty Popularity

If the following is true, can you find the value of (4 + 9)?

7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

  • Views : 70k+
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Mind Teasers : Maths Logical Brain Teaser

Difficulty Popularity

A man of faith visits the holy land where three temple are erected in a row offering a surreal divinity to the place. Awestruck at the sight of the magnificent temples, he visits the first temple where he finds that the number of flowers in his basket increases to double the number as soon as he sets his foot inside the temple. Astonished by the miracle he is completely happy and seeks it as a blessing of his god. He offers a few flowers to the stone idol of god and moves out.

Then he visits the second temple, where the same miracle happens again. The number of flowers in his basket again double up in number. With a smile on his face, he offers a few of flowers to the stone idol again and walks out after praying.

The moment he enters the third temple, the number of flowers increases to double again. Now he feels entirely blessed. He offers all the flowers at the feet of the stone idol and walks out in a moment of bliss.

When he walks out, he has no remaining flowers with him. He offered equal number of flowers at each of the temple. What is the minimum number of flowers he had before entering the first temple? How many flowers did he offer at each temple?

  • Views : 90k+
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Mind Teasers : Birbal Brain Teaser

Difficulty Popularity

Birbal is a witty trader who trade of a mystical fruit grown far in north. He travels from one place to another with three sacks which can hold 30 fruits each. None of the sack can hold more than 30 fruits. On his way, he has to pass through thirty check points and at each check point, he has to give one fruit for each sack to the authorities.

How many mystical fruits remain after he goes through all the thirty check points?

  • Views : 70k+
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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.

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

Mind Teasers : Math IQ Question

Difficulty Popularity

Adam is one of the finalist in an IQ championship. As the final test, he is provided with two hourglass. One of them can measure eleven minutes while the other one can measure thirteen minutes.
He is asked to measure exactly fifteen minutes using those two hourglasses. How will he do it ?

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

Mind Teasers : Impossible Maths Science Riddle

Difficulty Popularity

Cindy throws a ball from a 90 feet building. The ball is quite bouncy and when it hits the ground, it bounces back half way up. It keeps bouncing back to half way up.

How many bounces will the ball take before it comes to a permanent halt?

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

Mind Teasers : Hard Maths Number Riddle

Difficulty Popularity

Create a number using only the digits 4,4,3,3,2,2,1 and 1. So i can only be eight digits. You have to make sure the ones are separated by one digit, the twos are separated by two digits the threes are separated with three digits and the fours are separated by four digits

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