You can place weights on both side of weighing balance and you need to measure all weights between 1 and 1000. For example if you have weights 1 and 3,now you can measure 1,3 and 4 like earlier case, and also you can measure 2,by placing 3 on one side and 1 on the side which contain the substance to be weighed. So question again is how many minimum weights and of what denominations you need to measure all weights from 1kg to 1000kg.
For this answer is 3^0, 3^1, 3^2... That is 1,3,9,27,81,243 and 729
Ans: 45 45 85 and 55 66 116
Sol: a*b a*c a*b+a*c-b
1 aadmi ko 50 kilo aata piswaany jana hy,batao kis par jae ga?
1- Motor cycle par
2- Cycle par
Aata tou pisa huva hi hota hai.
Jack gave John the following challenge: "If you sit down in that chair, I bet I can make you get out of it before I run around the chair three times," he said.
"Aw, that's not fair," John said. "You'll just prick me with a pin or something."
"Nope," Jack said. "I won't touch you, either directly or with any object. If you get out of the chair, it'll be by your own choice."
John thought, accepted the challenge, and lo and behold, Jack won the bet. How did he do it?
Ans. "John sat down in the chair and Jack ran around it 2 times then Jack stopped and said, "I'll be back in a week to run the third time around."
How much dirt is there in a hole in the ground that's two feet wide, three feet long, and four feet deep?
Ans. None, because its a hole.
You have a jug that holds five gallons, and a jug that holds three gallons. You have no other containers, and there are no markings on the jugs. You need to obtain exactly seven gallons of water from a faucet. How can you do it?
Second Problem: You need exactly four gallons. How do you do it?
Ans. Fill 3 gallon jug , pour in 5 gallon jug, fill 3 gallon, pour 2 gallon in 5 gallon, you have 1 gallon left in the 3 gallon jug. Empty the 5 gallon. Pour the 1 gal into the 5 gallon, fill the 3 gallon and pour it in the 5 gallon (at this step you have 4 gallon). Fill the 3 gallon jug one last time and you now have 7 gallons.
A farmer is taking a fox, a chicken, and a bag of grain home. To get there, he must cross a river, but he's only allowed to take one item across the bridge with them at a time. If the fox is left alone with the chicken, the fox will eat the chicken. If the chicken is left alone with the grain, the chicken will eat the grain. How can the farmer cross the river without any of his possessions being eaten?
Ans. He'll carry chicken to other side. Then back and he'll carry the grain. On other bank he'll put the grain and take the chicken back. And on dis side , he'll put the chicken and he'll carry the fox, and return. And finaly he'll carry the chicken frm dis end.
I want you think about yourself in a squared room. There are no windows or doors. No exits at all. You can't break down the walls. It is empty with only you in it. How do you get out?
Ans. "Stop thinking" :P
A man who lives on the tenth floor takes the elevator down to the first floor every morning and goes to work. In the evening, when he comes back; on a rainy day, or if there are other people in the elevator, he goes to his floor directly. Otherwise, he goes to the seventh floor and walks up three flights of stairs to his apartment.
Can you explain why?
Ans. The man is of short stature. He can't reach the upper elevator buttons, but he can ask people to push them for him. He can also push them with his umbrella.
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. The dish will be full at 12:44.