Revathy

                   INTERESTING FACTS ABOUT 7 There are seven basic musical notes, namely, 'do', 're', 'me', 'fa', 'so', 'la' and 'te'. In Indian music they are 'sa', 're', 'ga', 'ma', 'pa', 'dha' and 'ni'. A ladybug commonly has seven spots! Most of the mammals' necks have seven bones. The number of rows in the periodic table is seven. The neutral pH value that lies between acidity and alkalinity is seven. The code for international direct dial phone calls to Russia and Kazakhstan is seven. Seven is also the number of digits in an American or a Canadian telephone number. Digital devices use a seven-segment display. The OSI model has seven layers. There are seven logic gates namely, NOT, NOR, XNOR, XOR, AND, NAND and OR.

                USING MATHS IN EVERDAY LIFE You may wonder what connects the maths you do in school to the real world. Will you ever have to solve an  equation  or find an angle outside your classroom? Maths is very useful and everyday maths is all around you. From activities as everyday as buying sweets or playing your favourite computer game, maths is everywhere. What you learn in maths lessons will be very important for your future. Shaping up with everyday maths: Shapes and space , is the oldest branch of maths. The Greeks were able to calculate the radius of the Earth (which they knew was round!) using the same techniques you learn at school. Much more recently, trigonometry helped to put men on the moon. In the modern world, the everyday maths in space and geometry are used in a range of applications. These include computer graphics, making sense of medical scans, designing haircuts, and many other things....

                    MATHEMATICAL QUIZ 1. How many digits are there in Hindu-Arabic System? (a) 10 (b) 20 (c) 30 (d) 40 Answer: A 2. Among the following which natural number has no predecessor? (a) 100 (b) 200 (c) 1 (d) 0 Answer: C 3. Which among the following is the largest known number in the world? (a) ∞ (b) googol (c) googolplex (d) gram Answer: C 4. What does 1 googol means? (a) 1 followed by hundred zeros (b) 1 followed by thousand zeros (c) 1 followed by ten thousand zeros (d) 1 followed by 1 lakh zeros Answer: A 5. Among the following which whole number has no predecessor? (a) –1 (b) 0 (c) 1 (d) e Answer: B   6. Counting numbers are kept under ________ number. (a) Natural (b) Whole (c) Rational (d) Odd Answer: A 7. An integer that is divisible by 2 is called: (a) Even number (b) Natural number (c) Odd number (d) Whole number Answer: A 8. In which number system...

                    MATHEMATICAL PUZZLE Mathematical puzzles make up an integral part of recreational mathematics. They have specific rules as do multiplayer video games, but they do not usually involve competition between two or more players. Instead, to solve such a puzzle, the solver must find a solution that satisfies the given conditions.