1) How many triangles are formed in a octagon?
Ans : 8C3
2) A can do a piece of work in 4 hours; B and C together can do it in 3 hours, while A and C together can do it in 2 hours. How long will B alone take to do it?
Ans : 12 is right
3) A tree grows only 3/5 as fast as the one beside it. In four years the combined growth of the two trees is eight feet.
How much does the shorter tree grow in two years?
Ans : 1.5
4) How many flowers do I have if all of them are roses except two, all of them are tulips except two, and all of them are daisies except two?
Ans : total 3 - one each !
5) Three humans, one big monkey and two small monkeys are to cross a river:
Only humans and the big monkey can row the boat.
At all times, the number of humans on either side of the river must be greater or equal to the number of monkeys on that side. (Or else the humans will be eaten by the monkeys!)
The boat only has room for 2 (monkeys or humans).
Monkeys can jump out of the boat when it's banked.
At all times, the number of humans on either side of the river must be greater or equal to the number of monkeys on that side. (Or else the humans will be eaten by the monkeys!)
The boat only has room for 2 (monkeys or humans).
Monkeys can jump out of the boat when it's banked.
Ans : 1- one man and one monkey
2- one man and one monkey3-same
6)A and B are friends. They decide to meet between 1pm and 2pm on a given day. There is a condition that whoever arrive first will not wait for the other for more than 15 min. Find the probability that they will meet on that day.
Ans : 7/16
7) If a cake of negligible thickness is to be cut into different pieces. How many maximum
pieces are possible if four cuts are made?Ans : 16
8) Three Masters of Logic wanted to find out who was the wisest amongst them. So they turned to their Grand Master, asking to resolve their dispute.
"Easy," the old sage said. "I will blindfold you and paint either red, or blue dot on each man's forehead. When I take your blindfolds off, if you see at least one red dot, raise your hand. The one, who guesses the color of the dot on his forehead first, wins."
And so it was said, and so it was done. The Grand Master blindfolded the three contestants and painted red dots on every one. When he took their blindfolds off, all three men raised their hands as the rules required, and sat in silence pondering. Finally, one of them said: "I have a red dot on my forehead."
How did he guess?
"Easy," the old sage said. "I will blindfold you and paint either red, or blue dot on each man's forehead. When I take your blindfolds off, if you see at least one red dot, raise your hand. The one, who guesses the color of the dot on his forehead first, wins."
And so it was said, and so it was done. The Grand Master blindfolded the three contestants and painted red dots on every one. When he took their blindfolds off, all three men raised their hands as the rules required, and sat in silence pondering. Finally, one of them said: "I have a red dot on my forehead."
How did he guess?
Ans : all three of them raised their hands. Also other 2 raised their hand after seeing a red dot...there was 2 person with red dot .1st man(no red dot) has seen 2 with red dot,2nd man(red dot) has seen 1 with red dot,3rd man(with red dot who responed) has seen only 2nd man with red and confermed as the 1st person has not any red dot but still 2nd person can see red dot...so the person 2nd man can see with red dot is 3rd man himself....in this way 3rd man guessed
9) How can you drop a raw egg onto a concrete floor without cracking it?
Ans : You can not crack a concrete floor just from a raw egg
10) A cat had three kittens: January, March and May. What was the mother's name.
Ans : its "what"
11 ) James Bond was pushed out of an airplane without any parachute. He survived. How?
Ans : Airplane is not in the air!
12) If two's company, and three's a crowd, then what is four and five?
Ans : 9
13) Twins (Adarsh and Anupam) were born in May but their birthday is in June. How's this possible?
Ans : May is name of a city
14) By using only one straight line, can you make the equation correct. 5+5+5=550?
Ans : 5 4 5 + 5 = 500
15)( ) + ( ) + ( ) + ( ) + ( ) = 30
This is what you have for the equation. The following are the numbers that you can use to fill in the brackets: 1, 3, 5, 7, 9, 11, 13 and 15. You can repeat the numbers if required. The resulting sum should be 30.Ans : (11-1)+(11-1)+(7-5)+(5-3)+(7-1)=30
16) The below is a number puzzle. It should be read left to right, top to bottom.
Question 1: What is the next two rows of numbers?
Question 2: How was this reached?
Question 2: How was this reached?
1
1 1
2 1
1 2 1 1
1 1 1 2 2 1
? ? ? ? ? ?
? ? ? ? ? ? ? ?
1 1
2 1
1 2 1 1
1 1 1 2 2 1
? ? ? ? ? ?
? ? ? ? ? ? ? ?
Ans : 3 1 2 2 1 1
The line of numbers just describes the line above it.
17)What mathematical symbol can be placed between 5 and 9, to get a number greater than 5 and smaller than 9?
Ans : Decimal
18) DVA * DVA = STYRI
D + V + A + D + V + A = S + T + Y + R + I
Replace the letters with the number.
Ans : 101*101 = 10201
19) A Petri dish hosts a healthy colony of bacteria. Once a minute every bacterium divides into two. The colony was founded by a single cell at noon. At exactly 12:43 (43 minutes later) the Petri dish was half full.
At what time will the dish be full?Ans : 12:44
20) What can travel around the world while staying in a corner?
Ans : Post Stamp!
thanx xmen
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