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A few methods for speed:When performing any of these multiplication algorithms, the multiplier should have as many zeroes prepended(prefixed) to it as there are digits in the multiplicand. This will provide room for any carrying operations. For instance, when multiplying 366 × 7, add one zero to the front of 366 (write it "0366"); when multiplying 985 × 12, prepend two zeroes to 985 ("00985"). Each digit but the last, including the prepended zeroes, has a neighbor, i.e., the digit on its right.To multiply by 12: Starting from the rightmost digit, double each digit and add the neighbor. This gives one digit of the result. If the answer is greater than 1 digit simply
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submitted by vagee (133 m) on 31 May 2007 16:41:09 IST (3 comments 452 views)
Given are the following three equations: = = = The Question: How many circles is a square, if you take the ratios in the three given equations; in other words: how many circles should be on the dots below?
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submitted by Urva (187 m) on 3 Jun 2007 16:32:48 IST (2 comments 80 views)
Look at the figure below, which shows fifteen men. The figure is subdivided into three areas (upper left, upper right, and the bottom half). By exchanging the upper two parts of the figure, one gets the figure below. This new figure however only shows fourteen men! (If you don't belief what happened here: please print it, cut it, and try it out yourself!) The Question: Where did the missing man go?
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submitted by Urva (187 m) on 3 Jun 2007 16:35:31 IST (2 comments 102 views)
I'd like to suggest the following books for JEE:- 1)PHYSICS:- Concept- HC Verma, Resnick and Halliday(Dont get dishearten if you can solve all the problems) Concepts are of most importance. Problems- IIT-JEE Physics TMH Last step:- For expertise in problem solving, refer to IE Irodov 2)Chemistry:- Concept and basics:- OP Tandon- Organic Chemistry, RC Mukerjee, But I've not found a gud book for Inorganic, NCERT Chemistry(This must be your first approach) You can solve problems from these buk and from the correspondence of FIITJEE and Brilliant too. 3)Maths:- My dad is a professor of Maths and he suggests the following buks:- Calculus- Das and Mukerjee, IA
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submitted by dekajyo (14 m) on 3 Jun 2007 17:59:47 IST (0 comments 153 views)
On the right you see a paper with a chess-board print on it. We want to cut the chess-board paper into pieces (over the lines!) such that each piece has twice as much squares of one color than of the other color (i.e. twice as much black squares as white squares or twice as much white squares as black squares). The Question: Is this possible? Give a proof!
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submitted by Urva (187 m) on 3 Jun 2007 16:36:32 IST (0 comments 78 views)
Placing Bricks Try to fill the total board (10x10-2) with bricks of size 2 ( and ), so no overlaps, no gaps, and no bricks crossing the borders. The Question: Is this possible? (Proof!)
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submitted by Urva (187 m) on 3 Jun 2007 16:33:32 IST (0 comments 49 views)
On the right you see a small shunting-yard with two wagons (blue and green) and one locomotive (red). The wagons have a length of 5 meters, and the locomotive has a length of 10 meters. The dead end between the buffer-stop and the switch on the lower left has a a length of 5 meters (so the locomotive cannot change tracks on the lower left switch), and the dead end between the switch and the buffer-stop on the lower right has a a length of 15 meters. The locomotive can move forward and backward, and can both pull and push wagons. The Question: How must the locomotive shunt the wagons, to arrive in a situation where the wagons have changed places and the locomotive
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submitted by Urva (187 m) on 3 Jun 2007 16:31:11 IST (0 comments 33 views)
Answer the question first............"If a circular wheel of radius 'r' rolls , then what is the distance that the centre of the circle traverses in the linear direction i.e parallel to the ground in one particular rotation.........?" The answer is easy na............. You would say 2(pie)r...........!!!!!!!Now answer a question asked by me in the following case as defined......Assume a small circular wheel of radius 'r' is fixed centre to centre to a large circular circular wheel of radius 'R'. Now we rotate the larger wheel on the ground by one complete rotation. Thus also the smaller wheel that is fixed to it will turn by one rotation.But in one rotation the smal
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submitted by debabratanag99 (273 m) on 2 Jun 2007 16:43:35 IST (5 comments 163 views)
regarding kvpy, 1)i'm joining 1st yr btech this yr and trying for kvpy Stream EB .what r the steps we have 2 take 4 it and plz tell abt the project report too(what type it should be--complicated or simpler one etc.Should the project be completed before we send the application ?and is it possible for me to complete considering the fact that i'm going to stay in hostel where there r 4 persons in a room! 2)as i'm going 2 join 1st yr only so i'm eligible 4 stream EA but due to lack of time would it be possible to finish by the last date? 3)what things we require for us to do it like library and teacher guidance enough? seniors ,experts and sp scholars please help
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submitted by doloman (28 m) on 2 Jun 2007 15:02:52 IST (0 comments 60 views)
Hey guys,comment on d following: a) self study wid methodical preparation can lead 2 great success in iitjee b) Rank the followng tutorials(corr.) in increasing order of their effectiveness: brilliant,fiitjee,resonance, sahil, vmc, insight, vidyalankar,career pt.,narayana, gupta tutorials, mtg monthly magazines
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submitted by sudevsaha (6 m) on 1 Jun 2007 12:18:56 IST (1 comments 131 views)
AMPERES LAW 31.1. Introduction Example: Problem 31.5 31.2. The solenoid Example: Problem 31.14 Example: Problem 31.15 31.3. Motion of charges in electric and magnetic fields 31.4. Crossed electric and magnetic fields 31.5. Forces on a wire Example: Problem 31.33 31.6. Torque on a current loop 31. AMPERES LAW 31.1. Introduction The magnetic field at a distance r from a very long straight wire, carrying a steady current I, has a magnitude equal to (31.) and a direction perpendicular to r and I. The path integral along a circle centered around the wire (see Figure 31.1) is equal to (31.2) Here we have used
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submitted by edison (4425 m) on 1 Jun 2007 16:23:38 IST (1 comments 173 views)
(Saints and Science)In This ArticleAmazing Science, Cosmology and Psychology, Medicine (Ayurveda), Aviation, Surgery, Paediatrics, Gynaecology, Anatomy, Physiology, Pharmacology, Embryology, Blood Circulation, Rhinoplasty, Amputation, Caesarian and Cranial surgeries, Anesthesia, Antibiotic herbs, Atomic theory, Chemistry Alchemical Metals, Astronomy and Mathematics, Geography, Constellation science, Botany and Animal science, Algebra, Arithmetic and Geometry, Planetary positions, Eclipses, Cosmography,and mathematical techniques, Force of Gravity, The Decimal, Metallurgy. When we look at scientists who are credited with the most important ideas of o
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submitted by INDIAN_ARMY19890 (1234 m) on 23 Apr 2007 00:05:51 IST (50 comments 1084 views)
Hi frnds, Urgently need your hlp.I'm a XII passed student & I had decided to sit 4 iit nxt yr.In classes XI & XII I had enrolled 4 Brilliant,fiitjee, pie but now I'm at a loss as I could not crack iit this yr. Please help me out. &
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submitted by sudevsaha (6 m) on 31 May 2007 16:46:40 IST (4 comments 199 views)
i recently purchased a book of mathematics by tata mcgraw hill for aieee winning edge series.found it quite helpful.the questions r accompanied by superb logical reasoning and lucid language with a variety of solved examples and time saving techniques. the chem and physics books of the same publication r also worth buying. cost around 425
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submitted by farazshams (0 m) on 31 May 2007 12:52:32 IST (2 comments 170 views)
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