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maths
 

maths

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plese see this. this will be very useful

plese see this. this will be very useful

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    maths maths Presentation Transcript

    • MATH MAGICSBY,PRITHVI HOUSE
    • CAN YOU MULTIPLY 4567 BY 9 IN 3 SECONDS? YES!THE ANSWER IS 41103
    • EXPLANATION1. First digit as it is ‘4’2. Replace all other digits by 1and the last digit by 0 1. 5 and 6 by1 2. 7 by 03. Finally write the 10’s compliment of the last digit i.e. ’3’ (10-7)=3
    • For this lovely piece of magic it is a good idea to have a bowl or something and before you do the trick put in number cards with these digits on. You also need a calculator. Ask your victim to choose a number between 1 and 6 and enter it on the calculator. Then follow these instructions: 1. Multiply the number by 9 2. Multiply the answer by 111 3. Multiply the answer by 1001 4. Divide the answer by 7.Say all the magic words you know and then ask them to pick anumbers out of the hat,. See if the number matches a digit on thecalculator it should! Carry on until all six numbers have appeared.All your victim needs to do is put them in the same order as on theircalculator screen!
    • Square of a two digit no.We know that(a+b)2=a2+2ab+b2(34)2 =32/2 x 3 x 4/42 =9/24/16 =1156