Number Theory

GROUP 3th

1.RIZKY TITIE R . (110210101029)2.SHOFIA HIDAYAH (110210101036)3.MARLIA SARI P . (110210101087)

Math TrickMath Trick Black HoleBlack Hole

Number TheoryNumber Theory

Math TrickMath TrickMultiply byMultiply by

11s11s

55s55s

77s77s

99s99s

88s88s

362537892 x 11 = …39878(10)(15)(17)(11)23987916812

So, 362537892 x 11 = 3987916812

Math TrickMath TrickMultiply byMultiply by

11s11s

55s55s

77s77s

99s99s

88s88s

625178342 x 55 = …30(40)(35)(30)(40)(75)(55) (35)(30)1034384808810

So, 625178342 x 55 = 34384808810

Math TrickMath TrickMultiply byMultiply by

11s11s

55s55s

77s77s

99s99s

88s88s

934358621 x 77 = …63(84)(49)(49)(56)(91)(98) (56)(21)771945613817

So, 934358621 x 77 = 71945613817

Math TrickMath TrickMultiply byMultiply by

11s11s

55s55s

77s77s

99s99s

88s88s

7464153246 x 88 = …56(88)(80)(80)(40)(48)(64) (40)(48)(80)(48)656845485648So, 7464153246 x 88 = 656845485648

Math TrickMath TrickMultiply byMultiply by

11s11s

55s55s

77s77s

99s99s

88s88s

62534253722 x 99 = …54(72)(63)(72)(63)(54)(63) (72)(90)(81)(36)(18)6190891118478So, 62534253722 x 99 = 6190891118478

Math TrickMath TrickMultiply byMultiply by

11s11s

55s55s

77s77s

99s99s

88s88s

Black HoleBlack Hole

)(3)(4

343434

)34()34()34(

cbacba

ccbbaa

ccbbaa

cba

34

34Prove :

Black HoleBlack Hole

0.30.4

)(3)(4

)2.().........(3)(4

343434

)34()34()34(

)1......(..........

cccc

cbacba

ccbbaa

ccbbaa

cba

34Prove :

we can’t cancel 0 on the right and the left side because if we cancel it, it means we divide 0 by 0 and the result is undefined.

THANK YOU