Riddles, The 17th lesson of Mathematics Tricks and Fun

Riddles, The 17th Lesson of Mathematics Tricks and Fun

Hello friends,This is the 17th lesson of mathematics

 tricks and fun tutorial . I am Dr Prema B Sejekan. 

Today we shall have a quiz test from the portions we

 have studied till now. All these days we have studied various methods for multiplication from Vedic mathematics .This helps us to quickly answer in 

seconds multiplication with big numbers. Now let us

 start the quiz.

Can you answer these three questions ? What is the square of 999999 and 666666 and 333333.

   You can do the calculation all three in 30 seconds.

back ground music will play during waiting period.

Answer is Sequence off five 9s, 8sequence of five 0s 

and 1

 Second question sequence of five 4s , 3 and sequence

 of five 5s and 6

Third question. Sequence of five 1s , 0 and sequence of five 8s, and 9.

Isn't it interesting.we have used here the special code 

one more one less..you can go back to our prev .

videos for clarification.

Here the question is on cubing. What is the cube of

 99999, and cube of 33à333 and cube of 66666 answer

 in 30seconds.

Here cube of 9 is 729 .write these digits in three gps 

like 

**** 7****2****9. Then fill up four 9s in front of 7, four

 0s in front of 2 and again four 9s in front of 9. Thus

 the answer is 99997 00002 99999.

Let us see the next question 33333= cube of 3 is 27.

write ****2****7

Now start adding give digits with each other from both sides. Then skip outer one digit from both sides add 

five digits together,then skip 2 digits add five digits

 from 

both sides.thus the answer is 37035925937037 .

Cube of 66666. Cube of 6 is 216 .first answer of 6

 digits 26666133336.then add as said earlier. Answer

 is 29628 74074 96296.

Can you answer these? 12345679x9 99999999

Divide 1234567 by 9999999

Square of 1111111

 12345679 x 9 99999999 = 12345678987654321

 Use Ekanyunena purvena

 Do you know , when you divide 1234567÷ 9999999 = 0.12345671234567

 When we divide a number with n digits, with same

 number of 9s we get a repeated sequence of same n digits.

1111111×1111111= 01234567654321

 What is the answer? Square of 288?

Cube of 996

Multiply 391 with 309

288×288 here we will take base 100×3 = 300.

288-12×288-12. We get 288-12 =276,. 12×12 =144since base 100 we have to add 1 to the other side.276×3 =. 828+1= 829.thus the answer is 82944

Cube of 996 = -4×3= -12 , 1000-12=988,. -12×-4=048,

Cube of -4= -064.

 1000-064= 936 .so answer is. 988048936

391×309 1+9= 10,. and first digit is the same so we

 can use antyayordasakepe = 4×3 =12, 91×09 = 0819, 

so answer is 120819.

 Can you quickly answer this ? 444444×999999

777777×999999

Multiply five2s with seven 9s

Multiply seven 3s with five 9s

Multiplysix 6s with four 9s

444444×999999= 44444 3 55555 6

   777777×999999= 77777 6 22222 3

 

   22222× 99 99999= R 8

 33333 33 x 99999 = 3333 2 99 6666 7

 666666 x 9999 = 666 5 99 333 4

 We have used the special code one more one less

 code here.The excess digit will become 9s.

For further clarification on the answers ,you can see

 the previous videos in the playlist.

In the coming classes we will start division by Vedic mathematics.

Thank you. Please subscribe to my channel.