Grandpa:
"My grandson is about as many days as my son is weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years?"
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A van containing pigeons on perches is being weighed on a scale. Something scares the pigeons and they all begin flying around inside the van. Does the total weight of the van and pigeons change?
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A van with all the windows closed contains some helium-filled balloons floating in it. When it starts accelerating what happens to the balloons?
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A barge with one man and a load of iron scrap is on a barge floating in a lock in the Panama Canal. If the man throws some iron off the barge into the water, what will happen to the water level on the side of the lock?
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A man needed to pay his rent and was out of money, but found that his rent was worth about one gold link on his chain per day. What is the fewest number of cuts he can make in his 23-link chain to pay the rent for up to 23 days?
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While a red mark was placed on the forehead of each of three blindfolded women seated facing each other in a circle, they were told that the the mark might be either red or white. Upon removal of the blindfolds, each was to raise her hand if she saw at least one red mark, and then to take it down if she could logically deduce the color of her own mark. All three hands were quickly raised, but then one of them lowered her hand. How did she know?
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Three men were standing in a row, all facing the same direction, so that there was one in back who could see the two in front of him, one in the middle, and one in front who could not see either of the other two. There were three blue and two red hats. One hat was placed on each man, without them seeing which two were left over. Each man was told the total number of each color of hat. First the man in the back was asked if he could deduce what color hat he had on, but he said he couldn't. Neither could the man in the middle, when he was next asked. But then man in the front, who could see neither of those behind him but could hear their answers, correctly deduced by logic what color hat he was wearing. What color was it and why?
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Two fathers and two sons went fishing. Each caught exactly one fish and yet there were only three fishes caught. Why?
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A drawer contains 10 black and 10 brown socks that are all mixed up. What is the fewest number of socks you can take from the drawer without looking and be sure to get a pair of the same color?
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Vedic Maths Tricks:
Multiplying 5 Times an Odd Number: Subtract one from the number you are multiplying, then halve that number and place a 5 after the resulting number.
Example: 343 * 5 = (343-1)/2 | 5 = 1715
Critical reasoning Concepts:
Basic Orientation of Critical Reasoning:
Intellectual Responsibility:
Adults are responsible for the things they do, and this includes thinking clearly and carefully about things that matter. This is hard work and no one succeeds at it completely, but it is part of the price for being in charge of your life.
In addition to thinking for ourselves, it is important to think well. This means basing our reasoning on how things are, rather than how we wish they were. It means being open to the possibility that we are mistaken, not allowing blind emotion to cloud our thought, and putting in that extra bit of energy to try to get to the bottom of things.
This doesn't mean that we should constantly be questioning everything. Life is too short and busy for that. But in many cases successful action requires planning and thought. It is also desirable to reflect on our most basic beliefs from time to time, and the college years are an ideal time for this. In the end you may wind up with exactly the same views that you began with. But if you have thought about them carefully, they will be your own views, rather than someone else's.
For more Tricks on Vedic Maths
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