Puzzles and Brain TeasersBrain teasers and puzzles help you to train your brain. So go ahead, take our Brain Teaser. And don't take a peek at the answer until you have tried really hard.
Brain Teasers and Puzzles
1 2 3 4 5 6 7 8 9 10 11 10 9 8 7 6 5 4 3 2 1
25 32 37 47 58 71 79 __ __
Add the sum of the digits of the number to the number to get the next one.
25 + 2 +5 = 32
32 + 3 + 2 = 37
37 + 3 + 7 = 47
47 + 4 + 7 = 58 and so on.
First, Second, Third, Forth, Fifth, Sixth, Seventh, Eighth
Forth (it should be fourth)
A C F H K M _
Pour water from the second glass into the fifth one.
6+4+3 -2 = 11
177-77 = 100
1. Remove pins from the left, right and bottom of the first figure. (3)
2. Remove pin from the bottom of the second figure (1)
3. Remove pins from the top and bottom of the third figure (2)
3+1+2 = 6
62 - 63 = 1
26 - 63 = 1
(2x2x2x2x2x2) - 63 = 1
64 - 63 = 1
17, 16, 13, 12
The numbers are arranged in alphabetical order.
23 Chickens and 7 Cows
Let the number of chicken be X and number of cows be Y
X+Y = 30
Chickens have 2 and cows have 4 legs.
Number of legs chickens have = 2X
Number of legs cows have = 4Y
2X + 4Y = 74.
Putting X = 30 - Y (from first equation)
2(30 - Y) + 4y = 74
60 - 2Y + 4Y = 74
2Y = 14
Y = 7
X = 30 - 7
X = 23
The farmer has 7 cows and 23 chickens.
1 score = 20
T, F, S, E, T, T, F, _, _, _, _, T, T, T, T
The first "T" stands for Two. Now go on adding 2 to the series and take the first letter: Four, Six, Eight, Ten, Twelve, Fourteen. This way, we will get Sixteen, Eighteen, Twenty, Twenty-two or S, E, T, T.
$360 & $240 respectively.
Let the initial amount in his wallet be 'X'. In the first journey, he paid 1/6th of X which we know is $60. So the equation is
1⁄6 x X = 60
X⁄6 = 60
X = 360
Hence, the initial amount is $360.
Now that he has paid $60 for the first trip, he is left with $(360-60) = $300.
In the return trip he pays 1/5th of what he had left which was $300. So if he pays 'Y' for the return trip, then the equation is
Y = 1⁄5 x 300
Y = 60
Hence after the return trip, he is left with $(300-60) = $240.
He had expected to start his preparations on Wednesday, and started it on Wednesday itself.
1049760 58320 3888 324 36 6 _
Here is how we get the sequence:
1049760/58320 = 18
58320/3888 = 15
3888/324 = 12
324/36 = 9
36/6 = 6
Going by this trend, the last equation should be
6/? = 3
Hence, 2 is the correct answer.
He charges $6 for every letter used to spell that item.
I won 24 and 2 ended in draw.
My neighbor won 5 matches which means that I owed him $10. However, he paid me $38 which means that I must have won $48 worth of matches. This converts to 24 matches.
Now if I won 24 matches, and my neighbor won 5, then the number of draws were 2 (31 - 24 - 5 = 2)
This is because all players except the champion have to lose one match.
We have 1 final where 2 players play.
We have 2 semi-finals where 4 players play. Thus, number of matches is 1 + 2 = 3.
We have 4 quarter-finals where 8 players play. Thus, number of matches is 3 + 4 = 7.
We have 8 pre-quarter-finals where 16 players play. Thus, number of matches is 7 + 8 =15.
We have 16 4th round matches where 32 players play. Thus, number of matches is 15 + 16 = 31.
We have 32 3rd round matches where 64 players play. Thus, number of matches is 31 + 32 = 63.
We have 64 2nd round matches where 128 players play. Thus, number of matches is 63 + 64 = 127.
We have 128 1st round matches where 256 players play. Thus, number of matches is 127 + 128 = 255.
16 players participated in the tournament.
If 16 players participated, then the first player played matches against the other 15 players. The second player has already played against the first player, and so has to play matches against only the other 14 players. In this manner, the second-last player has to play against only one player, and the last player has already played against all the players. Thus, the total number of matches is:
15 + 14 + 13 + 12 + 11 + 10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 + 0 = 120.
All 16 because birds can never fall from the air, they can fly. Isn't it?
Now, there were certain conditions:
- If the vender poured the sugar anywhere else than either of the two a sacks, it would become unfit for selling.
- The restaurant owner refused to exchange his better quality sack with the old one of the vendor.
- No matter how old his sack was, the vendor could not afford to cut a hole in his sack.
At first, the sugar was poured into the restaurant owner's sack. Then it was tied from the middle and turned inside out. After this, the salt was poured into the restaurant owner's sack. Then in this position, it was untied from the middle and the sugar was poured back to the vendor's sack.
Give one mango each to the four kids and give the fifth kid the mango along with the basket.
Just once because once you subtract 5 from 40, it becomes 35. Next time when you subtract 5, you are doing it from 35 and not 40.
120 minutes or 2 hrs. 5 pills can be taken over 4 half an hour intervals. Hence 4x30 = 120 mins.
Detach the first letter of each word and append it to the end. The new word will read the same as the original word when read from right to left.
Note: My daughter's father's grandfather had only one son and one daughter.
The lady is Juliet's mother-in-law.
Note - You cannot estimate by pouring out a random amount of water from or into any of the vessels. Also you cannot use any other vessel (s) besides these two, nor are you allowed to make any marking(s) on the vessels.
|Operation||8 gallon vessel (Vessel P)||3 gallon vessel (Vessel Q)|
|Take out 3G from P into Q, by filling Q to the brim||5||3|
|Again, take out 3G from P into Q, by filling Q to the brim||2||3|
|Pour remaining 2G from P into Q||0||2|
|Fill Q up to brim by pouring out water from P and 7G will remain in Q||7||3|
At 3:00pm, the minute and hour hand are distanced by a space of 15mins. In order to meet, the minute hand has to gain 15mins over the hour hand.
Thus, the minute hand gains 55 mins over the hour hand in 60 mins.
The minute hand gains 15 mins over the hour hand in (60/55) * 15 mins = 16 4/11
Thus after 3:00pm the minute and hour hands will meet at 16 4/11 mins past 3.