Brainhub

Saturday 31 August 2013

Series Puzzle

By ZEHEREELA 23:18 1 comment

#51

Difficulty Level - 2/5

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Solution :

51 (2x - 3 OR note down differences, you can see a geometric progression)

One Rupee Problem

By ZEHEREELA 16:50 Leave a Comment

#50

Difficulty Level - 2/5

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Solution :

There is no relation between Spend amount and Balance amount..
( Try to think, if he had spent 40 rs, then how come the spend amount and balance amount equals.. )

Math in Your Head

By ZEHEREELA 16:15 Leave a Comment

#49

Difficulty Level - 1/5

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Solution :

4100

Pastry Problem

By ZEHEREELA 15:13 Leave a Comment

#48

There are 20 members in a family & they have 20 pastries.
You have to divide pastries among them so that
Each child get 1/2 pastry,
Each lady get 2 pastries and
Each man get 3 pastries.
What is the exact no. of children, ladies & men in the family....??

Difficulty Level - 2/5

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Solution :

14 Children, 5 Ladies and 1 Man

Thursday 29 August 2013

Odd Box Problem

By ZEHEREELA 01:28 Leave a Comment

#47

You have 8 identical boxes (in size, shape and color), and a two arm balance scale. One of the box is heavier than the other ones.
In how many steps you can find the heavier box and how do you do it?

Difficulty Level - 3/5

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Solution :

2 steps only...
1. weigh 6 boxes (3 on each side).......
If
Both weighs equal
2. weigh the last two boxes and u'll find the heavier one
Else
2. Weigh two boxes from the heavier lot of 3
If both are equal.. 3rd one is heavier
Else u already know...

Which Garfield is different?

By ZEHEREELA 00:52 Leave a Comment

#46

Difficulty Level - 1/5

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Solution :

2 (Difference is Eyes)

Maths Problem

By ZEHEREELA 00:45 Leave a Comment

#45

How can u make 1024 by using exactly five 8's.....?

(You can use any mathematical operation)

Difficulty Level - 3/5

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Solution :

There can be many solutions.
a) {(8+8)/8}^(8/.8 )
b) 8*(8*8 + 8*8)
c) (8*8)*{Square root of (8*8)}*(Cube root of 8)
d) 8*(8+8)*Square root of (8*8)
e) [ Cube root of { (8*8)/8) } ^(8/.8 )
f) { Cube root of (8+8-8) }^(8/.8 )

Wet Hair Problem

By ZEHEREELA 00:32 Leave a Comment

#44

There were 3 persons in a boat at Brahmaputra river, later the boat capsized but only 2 persons got their hair wet . Where was the 3rd one & why he did not get his hair wet ??

Difficulty Level - 2/5

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Solution :

3rd one was also there & his hair didn't get wet because he was bald

Wednesday 28 August 2013

Logic Puzzle

By ZEHEREELA 23:59 Leave a Comment

#43

If the red house is on the right side of the white house and the blue house is on the left side of the white house, then, where is the white house ?

Difficulty Level - 1/5

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Solution :

White House is in Washington D.C.

Number Series Puzzle

By ZEHEREELA 23:45 Leave a Comment

#42

What is the next no in the series??
6, 14, 36, 98, 276, ??

Difficulty Level - 3/5

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Solution :

794 as 1 + 2^n + 3^n ; n=1, 2, 3, and so on.

Triangle Problem

By ZEHEREELA 23:38 Leave a Comment

#41

Difficulty Level - 5/5

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Solution :

104 Triangles.
( 2+6+6+6+6+6+6+6+12+24+24 ; counted diff sizes from the scratch )

Simple Maths Puzzle

By ZEHEREELA 23:35 Leave a Comment

#40

Difficulty Level - 2/5

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Solution :

Ans is (b)32 as (9 + 7)*2 = 32

Situation Puzzle

By ZEHEREELA 12:43 Leave a Comment

#39

A part of forest caught fire and a child inside a small cabin (which was locked from inside) died before the fire caught the cabin. So, how did the child die?

Difficulty Level - 5/5

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Solution :

The small cabin was the cabin of a plane that had crashed and started a fire, the child died from the crash not from the fire or the smoke inhalation.

Tuesday 27 August 2013

Maths Puzzle

By ZEHEREELA 23:22 Leave a Comment

#38

Using exactly 8 eights, how can you make 1000..?
(you can use any mathematical operation)

Difficulty Level - 2/5

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Solution :

There can be so many answers possible for this..
a) 888 + 88 + 8 + 8 + 8 = 1000
b) 8*(8*8 + 8*8) - 8 - 8 - 8 = 1000
c) (8*8)*{Square root of (8*8)}*(Cube root of 8) - 8 - 8 - 8 = 1000
d) {(8+8)/8}^(8/.8 ) - 8 - 8 - 8 = 1000
e) [ Cube root of { (8*8)/8) } ^(8/.8 ) - 8 - 8 - 8 = 1000
f) { Cube root of (8+8-8) }^(8/.8 ) - 8 - 8 - 8 = 1000

Friday 23 August 2013

Tricky Fraction Problem

By ZEHEREELA 13:13 Leave a Comment

#37

Can you arrange the numerals 1 to 9 in a single fraction that equals exactly 1/3 (one-third) ??
Example that doesn't work : 1234/56789 = 0.0217

Difficulty Level - 3/5

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Solution :

There can be two possible fractions.
5832/17496 and 5823/17469

Ring Problem

By ZEHEREELA 02:59 Leave a Comment

#36

Given the current price of gold, how much would you pay for the ring in the 'Lord of the Rings'?

Difficulty Level - 2/5

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Solution :

You can't pay for a virtual (i.e. not real) thing. The ring was in the movie only.

Simple Logic Puzzle

By ZEHEREELA 02:17 Leave a Comment

#35

Is it legal for a woman living in North India to be buried in South India?

Difficulty Level - 1/5

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Solution :

No. It is not legal to bury an alive person.

Thursday 22 August 2013

Crazy Puzzle

By ZEHEREELA 18:17 Leave a Comment

#34

If you are in a Ship, which is in the middle of the sea and suddenly you are surrounded by hungry sharks, just waiting to feed on you. How can you put an end to this?

Difficulty Level - 1/5

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Solution :

As you are on a ship, no need to worry because sharks can't jump on a ship. ( Though they can jump on a boat but not on a ship)

Matrix Problem

By ZEHEREELA 17:58 Leave a Comment

#33

Solve this operation on matrix by finding X?

Difficulty Level - 2/5

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Solution :

9 ( 1^3 + 9^3 = 730 )

Hard Thinking Puzzle

By ZEHEREELA 12:21 Leave a Comment

#32

River Temple River Temple River Temple
You are going to temple carrying some flowers. Whenever you crosses the river, the no. of flowers doubles everytime. You have to put exactly the same no. of flowers in the temple. You must carry some flowers, whenever you crosses river and after leaving the last temple, you must not have any flower.
How many flowers will you carry ???

Difficulty Level - 4/5

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Solution :

The minimum no. of flowers you can carry is 7. And you have to put 8 flowers at each temple.
General solution - Carrying 7n flowers and putting 8n flowers at each temple, where n = 1, 2, 3 and so on.

Tuesday 13 August 2013

Maths Puzzle

By ZEHEREELA 01:32 Leave a Comment

#31

Difficulty Level - 2/5

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Solution :

126. ( (9+5 = 14) * 9 = 126)

Monday 12 August 2013

Dirt Problem

By ZEHEREELA 23:59 Leave a Comment

#30

How much dirt is there in a hole that measures 2 feet by 3 feet by 4 feet?

Difficulty Level - 1/5

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Solution :

There can be no dirt in a hole..

Find The Number

By ZEHEREELA 23:11 Leave a Comment

#29

Find the no...
1 + 1 = 8
2 + 2 = 32
3 + 3 = 72
4 + 4 = ?

Difficulty Level - 2/5

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Solution :

16 * 8 = 128
(Ans is a * a * 8)

Sunday 11 August 2013

Beer Problem

By ZEHEREELA 23:05 Leave a Comment

#28

There are 6 glasses in a row. The 1st 3 are full of beer and the next 3 are empty.

By moving only 1 glass, how can you make them alternate between full and empty ??

Difficulty Level - 2/5

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Solution :

Pick up the second glass of beer and pour its contents into fifth glass..

Hard Thinking Puzzle

By ZEHEREELA 19:59 Leave a Comment

#27

What Seven letter word becomes longer when the third (3rd) letter is removed ??

Difficulty Level - 3/5

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Solution :

Lounger. When "U" is removed, it becomes "longer".
Meaning : A person spending time lazily or in a relaxed way.

Guess The Number

By ZEHEREELA 18:15 Leave a Comment

#26

I am an odd number.
Take away one letter and I become even.
What number I am??

Difficulty Level - 1/5

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Solution :

SEVEN. When "S" is taken away, it becomes "EVEN"

What Am I ??

By ZEHEREELA 17:33 Leave a Comment

#25

I am a word of 5 letters..

If you remove my 1st letter, I will be a form of energy..
If you remove my 1st 2 letters, I will be needed for living..
If you remove my 1st 3 letters, I will be a preposition..
If you remove my 1st 4 letters, I will be a drink for you...

Difficulty Level - 2/5

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Solution :

There are 3 possible answers namely Cheat, Wheat and Sheat.

Who am I ??

By ZEHEREELA 10:43 Leave a Comment

#24

Simultaneously I go up, I go down.
I go up towards the beautiful sky and down towards the greenground.
I am present tense.
I am past tense too.
Children loves me.
Who am I ??

Difficulty Level - 2/5

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Solution :

See-Saw

Word Problem

By ZEHEREELA 00:02 Leave a Comment

#23

What is a word made up of 4 letters, yet is also made up of 3. Although is written with 8 letters, and with 4. Rarely consists of 6, and never is written of 5.

Difficulty Level - 1/5

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Solution :

This is not a question.. Just an information.
Now, read it again to recheck.

Saturday 10 August 2013

How Many Triangles ??

By ZEHEREELA 23:09 Leave a Comment

#22

How Many Triangles ??

Difficulty Level - 3/5

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Solution :

27. You can also view How it is..

Friday 9 August 2013

Lateral Thinking Puzzle

By ZEHEREELA 12:47 Leave a Comment

#21

WHY ???

A man resides at the 17th floor and uses lift everyday. While leaving for office he reaches ground floor directly and follows to office. In the evening when he returns, if he is alone, first he will go to 10th floor and walk by stairs for the remaining floors, else if there are other people also with him or it is a rainy day, he manages to reach directly at the 17th floor. Why does he use such a technique?

Difficulty Level - 2/5

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Solution :

Man's height is very short and he can't reach the button for the 17th floor & when it is raining, he takes his umbrella with him and uses that to reach the higher buttons.

Isolated Island Problem

By ZEHEREELA 11:23 Leave a Comment

#20

A Farmer took a tractor to an island (where alternate seasons go on). The island was in the middle of a very deep lake and isolated from the cities as there is no mode of transport to reach there. So, how did the farmer get that tractor there???

Difficulty Level - 3/5

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Solution :

Due to heavy snowfall, the lake got frozen and the farmer drove that tractor to reach the island.