Maths Trick Chapter 1

Lesson1 Lesson1 These lessons are based on Vedic Maths† principles and other maths tricks. These principles are general in nature and can be applied in many ways and very very useful in commercial arthematics. I hope all of you like these lessons and make your calculation more fast and save lot of time in daily calculations and examinations or any entrance test like CAT /IIT /BANK PO /ENGINEERING ENTRANCE TEST/PMT /MCA ENTRANCE TEST/MBA ENTRANCE TEST etc etc Method for multiplying numbers where the first figures are same and the last figures add to1 0 . 42 x 48 = Both numbers here start with 4 and the last igures (2 and 8) add up to 10. just multiply 4 by 5 (the next number up) to get 20 for the first part of the answer. And we multiply the last figures: 2 x 8 = 16 to get the last part of the answer Method for multiplying numbers where the first figures add up 10 and the last figures are same 44X64 Here first figures are 4 and 6 and their add up 10 and unit figures of both numb er are same Just multiplying the last figures 4Ãâ€"4=16 Put it at right hand side Again multiplying the first figures and add common degit(4Ãâ€"6 )+4=24+4=28 put it at left hand side Now we get required answer2816Similarly 36Ãâ€"76 , 6X6 =36 right hand side , (3Ãâ€"7)+6= 21+6=27 left hand side Required answer is 2736 NOTE If multiplication of last figures is less than 10 add zero before unit digit Ex 81Ãâ€"21 , 1Ãâ€"1=01,( 8Ãâ€"2)+1= 16+1=17 Required answer 1701 Method for multiplying numbers where the first number†s add up10 and and the second number's digits are same 46X55 Here first number's add up is 10 and second number â€Å"s digits are common i. e 5 Just multiplying last figures of both numbers 6Ãâ€"5 =30 put it at right hand side Again multiplying first figures of both numbers and add common digit of second number (4Ãâ€"5)+5 =20+5 =25 put it left hand sideRequired answer is 2530 ( If multiplication is in unit in first step add zero before it) file:///D|/Docu ments%20and%20Settings/sanjay/Desktop/maths%20tricks/lesson1ur20. htm (1 of 3)6/25/2003 4:00:19 PM Lesson1 Multiplying numbers just over 100. 108 x 109 = 11772 The answer is in two parts: 117 and 72, 117 is just 108 + 9 (or 109 + 8), and 72 is just 8 x 9. Similarly 107 x 106 = 11342 HOW USEFUL IS THIS CALCULATION! EXAMPLE 1 Compute the amount and the compound intrest on Rs 10000. 00 on 2. years at4%per annum. Now 4Ãâ€"4=16 and 4+4=8 put 10 it becomes Rs 10816. 00 How simple ! o calculation no extra time ! Practice Test 1 Solve mentally these questions Note down your calculation time by watch (Suggested time 90 seconds) 22 X 28 35 X 35 48 X 42 73 X 33 12 X 92 48 X 28 28 X 22 37 X 88 91 X 66 118 X105 109 X108 112 X106 91 X 99 33 X 37 55X55 Now check your answer with the help of a calculator Back Home Next file:///D|/Documents%20and%20Settings/sanjay/Desktop/maths%20tricks/lesson1ur20. htm (2 of 3)6/25/2003 4:00:19 PM Lesson1 file:///D|/Documents%20and%20Settings/sanjay/Desktop/maths% 20tricks/lesson1ur20. htm (3 of 3)6/25/2003 4:00:19 PM