Difficult Puzzle
Difficult Puzzle- This puzzle is really difficult and very analytical but the good thing about it is it can have multiple ways of reaching at the correct answer. So if like solving very difficult puzzles, try this one!!
Dilemma of a Trainee Technician
A 120 wire cable has been laid firmly underground between two telephone exchanges located 10km apart.
Unfortunately after the cable was laid it was discovered to be the wrong type, the problem is the individual wires are not labeled. There is no visual way of knowing which wire is which and thus connections at either end is not immediately possible.
You are a trainee technician and your boss has asked you to identify and label the wires at both ends without ripping it all up. You have no transport and only a battery and light bulb to test continuity. You do have tape and pen for labeling the wires.
What is the shortest distance in kilometers you will need to walk to correctly identify and label each wire?
Most Difficult Riddle: Einstein Riddle
Most Difficult Riddle: One of my friend have forwarded me this mentioning the background. It claims that this mathematical puzzle was created by Einstein. Though we don't vouch for this claim but in any case it is very interesting to solve this. So guys go ahead and solve. We are ready to give the solutions too, if you all fail to solve it. But hope that's not the case. All the best!
Albert Einstein created this riddle in the late 1800s, and claimed that 98% of the world population couldn't solve it. It is a good brain exercise. Here it is:
- In a street there are five houses, painted five different colors.
- In each house lives a person of different nationality.
- These five homeowners each drink a different kind of beverage, smoke different brand of cigar and keep a different pet.
Einstein's riddle is: Who owns the fish?
Mathematical Puzzle
"Dad, where had you been?" asked Jimmy
.
"I had been to the attic, my son," replied Dad. "And do you know what I saw there? There was a big web with 23 spiders and flies on it."
"How many spiders were there?" asked the little boy with curiosity.
"Well, there were a total of 146 legs on the web," answered Dad with a smile. "Now you can find out how many spiders were there by yourself. Can't you?"
Can you help the little boy find out how many spiders were on the web in the attic?
Math Riddles
Math Riddle - 1
A 26" x 26" square metal plate needs to be fixed by a carpenter on to a wooden board. The carpenter uses nails all along the edges of the square such that there are 27 nails on each side of the square. Each nail is at the same distance from the neighboring nails. How many nails does the carpenter use?
What if the metal plate is in the shape of a regular polygon (e.g., pentagon, hexagon, heptagon, octagon, etc.)? Try generalizing the above result to the case of a regular polygon.
Math Riddle - 2
A painting job can be completed by 5 painters in 37 days. If 10 more painters join the team 7 days after starting work on the job, then how many more days are required to complete the job?
The number of days for the job is inversely proportional to the number of painters. So, is 'number of days × number of painters = constant'?
What assumptions were made to arrive at the solution?
Is something assumed about the output of the painters?
Fast Multiplication Tricks
Simple Fast Multiplication Tricks & Techniques
Fast Multiplication by 5: Multiply by 10 (just place 0 after the original number) and divide the result by 2.
Fast Multiplication by 6: Sometimes subsequent multiplication by 3 and then 2 is easy.
Fast Multiplication by 9: Multiply by 10 (just place 0 after the original number) and subtract the original number.
Multiply by 12: Multiply by 10 and add twice the original number.
Multiply by 13: Multiply by 3 and add 10 times original number.
Multiply by 14: Multiply by 7 and then multiply by 2
Multiply by 15: Multiply by 10 and add 5 times the original number, as above.
Multiply by 16: You can double four times, if you want to. Or you can multiply by 8 and then by 2.
Multiply by 17: Multiply by 7 and add 10 times original number.
Multiply by 18: Multiply by 20 and subtract twice the original number (which is obvious from the first step).
Multiply by 19: Multiply by 20 and subtract the original number.
Multiply by 24: Multiply by 8 and then multiply by 3.
Multiply by 27: Multiply by 30 and subtract 3 times the original number (which is obvious from the first step).
Multiply by 45: Multiply by 50 and subtract 5 times the original number (which is obvious from the first step).
Multiply by 90: Multiply by 9 (as above) and put a zero on the right.
Multiply by 98: Multiply by 100 (just place 00 after the original number)and subtract twice the original number.
Multiply by 99: Multiply by 100 (just place 00 after the original number)and subtract the original number.
Did you liked the above fast multiplication tricks ?
Please leave a comment below, that will help us to improve
Vedic Mathematics Techniques for Finding HCF
Vedic Maths Trick to find the HCF of Algebraic Expressions
To appreciate the Vedic Maths process of finding the HCF you first need to know the other methods taught in school. I am giving you two other methods to compare with.
Example 1: Find the H.C.F. of x^2 + 5x + 4 and x^2 + 7x + 6.
Who is behind QuickerMaths?
I am Vineet Patawari - PGDM (IIM Indore), ACA, B.Com(H). My passion for Mathematics, specially Vedic Maths encouraged me to start QuickerMaths
I believe that if trained properly using powerful tools like Vedic Maths, the immense intellect of human mind can be ignited instantly - find out more
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Recent Comments
watchman was paid for awaking not for sleeping so that he can see dreams.. – 05Feb12
as a night watchman he shouldnt have slept at night to get that dream... – 04Feb12
Can u plz give me clarity in ur solution Kaush sir..... – 04Feb12
thanks for these tricks. Are these from the book "quicker maths by m.tyra" ? – 03Feb12
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