This hub pages website gives useful tips in mental mathematics.
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	Read about the life of Trachtenberg in this website. I salute the spirit of the genius who refused to accept defeat and found calmness and solace amidst death and destruction.
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	This is a very good site containing good puzzles which could give work out to your brain. Do pay a visit to this web site 
http://playwithyourmind.com/
		
		
		
		
		
		
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	This site contains useful things which everybody needs like how to tackle the bullies etc 
http://www.livejournal.com/ This site gives knowledge about the current affairs.
		
		
		
		
		
		
	
	
	
	
	
	Any person who is serious to know about magic squares, stars, cubes etc will necessarily have to come to these websites 
http://www.recmath.com/ and 
http://magic-squares.net/ These websites are a compilation or, we can also say the bible of the magic squares, cubes etc.
		
		
		
		
		
		
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	
		
		
		
		
		
		
		
		
		
		
		
		
			
			
			
			
			
			
		
		
		
		
		
		
		
		
		
		
		
		
			
			
			
			
			
			
		
		
		
		
		
		
		
		
		
		
		
		
			
			
			
			
			
			
		
		
		
		
		
		
		
		
		
		
		
		
			
			
			
			
			
			
		
		
		
		
		
		
		
		
		
		
		
		
			
			
			
			
			
			
		
		
		
		
		
		
		
		
		
		
		
		
			
			
			
			
			
			
		
		
		
		
		
		
		
		
		
		
		
		
			
			
			
			
			
			
		
		
		
		
		
		This website is also from Grogono and it is a treasure trove of knots. I was wonder struck with this one. It is useful to the students in general and the scouts and the National Cadet Corps in particular. 
www.animatedknots.com
			
			
			
			
			
			
 
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	This website is a free Math resource for Mathematics from Algebra to Differential equations. It is being run by people who are Doctorates in Mathematics. 
http://www.sosmath.com/index.html
		
		
		
		
		
		
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
		
		
		
		
		
		
	
	
	
	
	
	 
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