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# Puzzles and Brain Teasers

Brain teasers and puzzles help you to train your brain. So go ahead, take our Brain Teaser of the day. And don't take a peek at the answer until you have tried really hard.

## Brain Teasers

Fill in the blanks in the following sentence with an anagram:
Almost a _________ started between two brothers to decide who will use their father's _________.

Answer battle and tablet.

Fill in the sequence:
ND,  JF,  MA,  ?,  ?,  SO

Answer MJ and JA

Explanation:: "ND" is for November & December, "JF" is for January & February, "MA" is for March & April and so on.

Replace one letter in each step to change the word COLD to its opposite. Each step has to be a legitimate word.
COLD
?
?
?
?

Answer WARM

Explanation:

COLD
CORD
WORD
WORM
WARM

Paris, Uganda, Zambia, Zimbabwe, Libya, England, ?
Complete the sequence by choosing the correct one amongst the following: Mexico, Singapore and Netherland.

Answer Singapore

Explanation: The first letters of each word makes the word PUZZLES.

Fill in the blanks in the following sentence with an anagram:
Almost a ______ started between two brothers to decide who will use their father's ______.

Answer battle and tablet.

Fill in the sequence:
prl,  my,  jn,  jly,  gst  ?

Answer sptmbr

Explanation:Name of the months after removing the vowels - APRIL, MAY, JUNE, JULY, AUGUST, SEPTEMBER.

One day on reaching school I found there were a total of 16 bicycles and tricycles parked in the school compound. I counted the total number of wheels to be 38. Find out the number of bicycles.

Answer 10 bicycles.

Explanation:: All the cycles will have at least 2 wheels, so 16 cycles will have 16x2=32 wheels. But in total there are 38 wheels. So the extra wheels (38-32=6) must be of the tricycles because bicycles have 2 wheels and tricycles have 3 wheels.
Therefore, the number of tricycles parked is 6 and hence the number of bicycles is 10.

Fill in the blanks with a word which makes two different words if you read from both sides:
Tim's father has kept his ______ in the ______ for scoring good marks in math.

Answer Reward and Drawer.

By changing the position of only one arrow, correct the below equation: Answer  There are 17 pigeons sitting in a row on a wall. A boy shoots the fifth pigeon. How many pigeons remain?

Answer None.

Explanation: They all fly away at the sound of the gunshot.

Mr. & Mrs. Smith went for a picnic. Mrs. Smith has 5 sons and each son has a sister who has 5 daughters each of whom have 1 brother each. How many of them went for the picnic?

Answer 2 people.

Explanation: The puzzle only says that Mr. and Mrs. Smith went for a picnic. It does not say that the others accompanied them.

Fill in the empty space: Answer 149

Explanation: Triangle 1: 32=9 and 42=16 hence 916. Triangle 2: 22=4 and 52=25 hence 425 and so on.

Fill in the sequence:

DFH,  KMO,  RTV,  YAC,  ?

Answer FHJ

Explanation: In a cave there is a treasure within a big metal box with a lock on it. There is also a monster in the cave that has two keys with him; one gold and the other silver. The monster will give you only one chance to open the lock using one of the keys. If the box doesn't open, the monster will kill you. Since the monster is a bit helpful it would give you a clue in finding out the correct key. Can you choose the correct key by deciphering the below clue?

A GKOY OEPD LYEO DCNO EAAR NNN

Answer The gold key will open the lock.

Explanation:
The clue says "A Golden Key Can Open Any Door".
Take the first letter of each word, then the second letter of each word, then the third letter and so on and construct the sentence.

Complete the sequence:
4,   7,   15,   29,   59,   117   ?

Answer 235

Explanation:
4+3=7
7+4x2=15
15+7x2=29
29+15x2=59
59+29x2=117
117+59x2=235

A tunnel is 650m long. How far can a horse run into the tunnel if the horse is running at a speed of 10km/hr?

Answer 325m

Explanation: After that the horse is running out of the tunnel.

Little John has a habit of throwing things whenever he gets angry. One day he throws a toy of his and it again comes back to him without bouncing off anything. How did this happen?

Answer John had thrown the toy straight up in the air.

What is half of 4 plus 4?

Answer 6.

Explanation: Half of 4 is 2 and then plus 4 is 6.

If NUMERAL is written as UEALRMN then how would you write ALGEBRA?

Answer LERABGA

Explanation: How can you fit five roses in 9 boxes? No box can remain empty.

Answer  Find the odd one out:

Answer Mouth.

Explanation: All the words except "mouth" are palindromes (reads the same backward and forward).

The vowels from the following words have been removed. Put the vowels and name the animals.
pnd
lprd
td
lphnt
trts
chmln

Answer Panda
Leopard
Elephant
Tortoise
Chameleon

Find the missing number:
6   13   25   51   101  ?

Answer 203

Explanation:
6x2+1=13
13x2-1=25
25x2+1=51
51x2-1=101
101x2+1=203

Fill in the sequence:
1   5   9   15   ?

Answer 21

Explanation: Position of the vowels a e i o u.

Fill in the sequence:
1   2   3   2   1   2   3   4   2   ?

Answer 1

Explanation: Number of characters used in writing the numbers in roman numerals.

Place a word with 4 letters in between the two words so that it can be used as a prefix and suffix to make two new words.
SPOILS_______ION

Answer PORT

How can you write 23 using the number 2 only 4 times? You can use addition, subtraction, division, multiplication.

Answer 22+2/2

Complete the sequence:
49   61   51   63   53   65   55   ?

Answer 67

Explanation: Alternate numbers increase by 2. 49 become 51 then 53 and so on. Similarly, 61 becomes 63 and then 65.

Two lawyers were fighting against each other in a case in a courtroom. One of them is the father of the other's son. How are they related?

Answer They are husband and wife.

Tim came second in Math. When his mother asked him how much he had scored, he answered that he got the sum of the first 9 even numbers. His mother immediately worked out the answer. How much had he scored in Math?

Answer 90

Explanation: Sum = (n x n) + n
Hence, 9 x 9 = 81 + 9 = 90

Use the word "dormitory" to make two words which will complete the below sentence.
Daniel stays in a _______   _______.

Answer dirty room

If 0=4, 1=3, 2=3, 3=5, 4=4, 5=4, 6=3, 7=5, 8=5 and 9=4, find the value of 10, 11 and 12.

Answer 10=3, 11=6, 12=6.

Explanation: Number of letters in the spelling of each figure.

Name four days of the week starting with the alphabet "T".

Answer Tuesday, Thursday, Today and Tomorrow

Complete the sequence:
B   E   J   Q   ?

Answer Z

Explanation:
B+3=E
E+5=J
J+7=Q
Q+9=Z

Fill in the sequence:
10   10   22   9   24   8   26   ?

Answer 7

Explanation: There are two series - 20, 22, 24, 26 and 10, 9, 8, 7.

Which number can you put to fill in the sequence?
23   1   3   25   16   20   6   9   20   ?

Answer 19

Explanation: Position of first letter of the words in the question in alphabets.

C   D   F   H   I   L   L   ?

Answer  Answer My Mother.

Fill in the blank:
_   T   T    F    F
S   S   E   N   T
E   T   T    F    F
S   S   E   N   T

Answer O

The letters are the first alphabets with which the counting numbers start. One, Two, Three etc.

John paid a sum of money for purchasing 20 pens, which he recovered in full when he sold 15 of them. What was his percentage of profit or loss per pen?

Answer 33.33%

If the sum he paid whilst purchasing 20 pens = A,
Then the Cost Price of each pen = A/20.
Since the amount he got whilst selling 15 pens is also = A
Then the Selling Price of each pen = A/15.
Since Selling Price > Cost Price, he made a profit.
Profit per pen = Selling Price - Cost Price = A/15 - A/20 = A/60.
Profit percentage per pen = Profit per pen / Cost per pen x 100 = (A/60) / (A/20) x 100 = 33.33%

A lady introduces a man by saying that her mother-in-law was the only daughter of the man's mother-in-law. How are the lady and man related?

Answer The man is the lady's father-in-law.

Fill in the sequence:
aceg   jlnp   suwy   ?   kmoq

Answer bdfh

Decode the following message:
AENDFNDFNNIRDERDESIIEIIEAEND

Answer A friend in need is a friend indeed.

Explanation: Write the alphabets in four rows for example: If WINTER is written as 231017241024 and SUMMER is written as 192216171024, then write AUTUMN.

Answer 12223251819.

Explanation: First letter is written as its position in alphabetical order, the second letter is written as its position plus 2, third letter is written as its position plus 3 and so on.

In a certain code if CAB is written as XZY and TRAIN is written as GIZRM, then decode EVSRXOV.

Answer VEHICLE

Explanation: Each letter in the old word is the same number of places from the start of the alphabet as its corresponding letter in the new word is from the end of the alphabet. For e.g. Look at the below two words:
CAB
XZY

"C" is 3rd in the alphabetic (from the start), and its corresponding letter in the new word, "X", is 3rd in the alphabet (from the end). Similarly, let's look at the third letter in the same two words:
CAB
XZY

"B" is 2nd in the alphabet and so is its corresponding letter, "Y", from the end of the alphabet. If we use the same logic, then "EVSRXOV" will give us "VEHICLE".

Make 7 even without adding, subtracting, multiplying or dividing any number with it.

Answer Remove "s" from seven.

If MANGO is written as 41576 and APPLE is written as 17735, then GRAPES would be written as:

Answer 7917510

Explanation:
All letters whose position in the alphabet is below 10, are being represented by their position number.
All letters whose position is 10 or more, are being represented by their position number minus ten.
Therefore:
G is 7
R is 18-9=9
A is 1
P is 16-9=7
E is 5
S is 19-9=10

Prove that taking away 1 from 19 makes 20.

Answer Take "I" away from Roman 19 (XIX) and you will get Roman 20 (XX).

Tony went out for an evening walk with a lady whom he introduced to his friends as his father in-law's only daughter's mother in-law's daughter. What is Tony's relation with this lady?

Answer Complete the sequence:
6   7   9   8   6   8   ?

Answer 6

Explanation: Number of alphabets in the days of a week. Monday contains 6 letters; Tuesday contains 7 letters and so on.

Fill in the missing number:
18   14   12   11   ?   10.25

Answer 10.5

Explanation: Divide each number by 2 and then add 5 to it.

Fill in the missing numbers:
9   2   18   3   36   4   72   ?   ?

Answer 5 and 144

Explanation: There are two parallel series, first series indicated in bold and the second in normal font: 9 2 18 3 36 4 72 5 144
In the first series, the numbers are doubling. In the second one, they are increasing by one.

Fill in the sequence:
6   12   16   18   24   26   ?   ?

Answer 30 and 36.

Explanation: These numbers either contain the digit 6 or are divisible by 6.

Decode the following sms code to read the message:
44   33   555   555   666   333   777   444   33   66   3   7777

Answer Hello friends

Explanation: Press the digits in sequence on your cell phone, for e.g. pressing 4 twice will give H, pressing 3 twice will give E and so on.

If six thousand six hundred and six dollar is written as \$6,606, then write eleven thousand eleven hundred and eleven dollars.

Answer \$12,111.

Sam's son is the brother of the only sister of Andrew. Dorothy, the only daughter of Sam, has only two brothers. What is the relation between Sam and Andrew?

Answer Sam is Andrew's father.

Pick the odd one out:
Crabcake, Laughing, Calmness, Canopy, Stupid, Hijack, First, Deft, Happy

Answer Happy

Explanation: All the words except "happy" contain three consecutive letters of the alphabet.
Crabcake, Laughing, Calmness, Canopy, Stupid, Hijack, First, Deft

Fill in the missing pair:
BF   CH   ?   HO   LT

Answer EK

Explanation: Someone gave a gift to Sam. While telling this to his friends, he said that the gift was given by his mother's brother's only brother-in-law. Who was it who gave the gift to Sam?

Answer Sam's father.

If BDG is equal to CFJ, then find the value of EGJ.

Answer FIM

Explanation: 1   2   3   4   5