When I was going through my sisters old books I found some brain stormers there and they were quite challenging.So I thought of sharing those with you.Lets see how many of your answers are correct in the end..1. A boat used for joy rides floats on a lake with the mark "5" on the water surface.If the water level in thelake goes up by 3 inches how many inches of the scale will be below the water level?
2. There are a few birds,peached on two trees.If one bird flew from one tree to the other,the number of birds on the second tree would be thrice the number on the first tree.If one bird flew from the second tree to the first,the number of birds on both trees would be equal.How many birds are there in each of the trees?3. Mr Bill showed a photograph of a man to one of his friends and said that the father of this man in the photograph is his father's son.Mr.bill has no brothers.Who is the man in the photograph?
4. The family that just shifted to the house next to ours consists of a grandfather,a grandmother,two fathers,two mothers,a son in law,a mother in law,a father in law,a son,two daughters,a grandson,a granddaughter,a brother,a sister,3 children and 2 grandchildren.
If the actual number of people in that household is less than 10,list down the structure of the family.
5. A monkey tries to climb a tree 12 metres high.In one hour it climbs 4 metres and falls 3 metres.How long will it take the monkey to reach the top of tree?6. While investigating a car theft,the police called four suspects and questioned them.
"It is not me" said Tim.
"I am sure Peter did it" Jack said.
"If jack says I'm the thief,he is telling a lie" Peter objected.
"On that day,I saw jack driving that car" Ken said.
If only one of the four are lying who is responsible for the car theft?
7. Jim used to collect cigarette ends and uses them to make his own cigarettes.He needs 5 ends to make one good cigarette.
If he only has 25 cigarette ends,how many cigarettes can he make out of them?
8. Starting from the North Pole,a man walks 10 miles south,then 10 miles west and then 10 miles north.
How far is he from the starting point?
9. A brick weighs 600 grammes and one quarter of a brick.What is the weight of one and a half bricks?
10. Evans Island is occupied by 2 tribes;Natives and foreigners.Natives always tell the truth and foreigners never tell the truth.Recently I met Jim,Harry and Eddy from the island while I was there on holiday.
When I first asked their names,the first person said his name was Jim.The second person told me that his name was not Jim and the third person said he was not Harry.
If two of them were foreigners what is the name of the native?
Answers
1.The number of divisions of the scale below the water level is independent of the water level in the lake.Therefore,the boat remains underwater up to the 5 mark.
2. 3 and 5 birds.3.Mr Bill's son.
4.There are 6 people altogether.They are father,mother,their son and daughter and the mother's parents.
5.In 1 hour the monkey actually climbs only 1 metre,After 8 hours it has climbed 8 metres.After 9 hours it would have reached the top of the tree.
6.The statements made by Jack and Peter are contradictory.Therefore one of them is false.Hence,Tim's and Ken's statements are true and so Jack is responsible for the theft.
7.He can make 5 cigarettes out of the 25 ends and one more from the ends of these 5 .Hence he can make a total of six cigarettes.
8.He is back at the North pole.
9.Three quarters of the brick weighs 600g.Therefore 1 1/2 bricks weigh 1200g
10.There are 2 foreigners and one native.Hence only one of them is telling the truth.Assume that the 1st person is telling the truth,then the second person is lying and this is a contradiction.Next if the second person is telling the truth the third person has to be harry,the first is Eddy and this is again a contradiction.Finally assume the 3rd person's statement is true.Then the third person is Eddy.Hence Eddy is the native.
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