prove that

29-1=30 15-1=16 from that 11-1=10

• Katta
• 01 Jan
• 12 Answers

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• • Swati
  • 29 Apr

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• • K
  • 29 Apr

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• • Mitali
  • 12 Apr

  11-1=10 11=10+1 multiply and divide r.h.s with 1-1 11= (10+1)(1-1) / (1-1) 11= (9+1+1)(1-1) / (1-1) 11= [9(1-1)+(1+1)(1-1)] / (1-1) ------->(a+b)(a-b)=a²-b² 11=9(1-1)/(1-1) + (1²-1²)/(1-1) 11=9 + (1-1)/(1-1) 11=9+1 do the same above process again, we get 11=8+1 this can be written as 11=9 => 11=10-1 => 10-1=11 add 19 and 5 on both sides in different equations, we get 29-1=30, 15-1=16 hence proved

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• • Moparthy
  • 31 Aug

  11-1=10
  11=10+1
  multiply and divide r.h.s with 1-1
  11= (10+1)(1-1) / (1-1)
  11= (9+1+1)(1-1) / (1-1)
  11= [9(1-1)+(1+1)(1-1)] / (1-1)          ------->(a+b)(a-b)=a²-b²
  11=9(1-1)/(1-1) + (1²-1²)/(1-1)
  11=9 + (1-1)/(1-1)
  11=9+1
  do the same above process again, we get 
  11=8+1
  this can be written as
  11=9 => 11=10-1 => 10-1=11
  add 19 and 5 on both sides in different equations, we get
  29-1=30, 
  15-1=16
  hence proved??

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• • SK
    Swapnil
  • 31 Aug

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• • SS
    Shilpa
  • 31 Aug

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• • Thanga
  • 30 Aug

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• • KM
    Krupesh
  • 30 Aug

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• • Kundan
  • 30 Aug

  you can do like this...11-1=10, add 20 both sides, ie: 11+20-1=10+20, this will results 30=30; and in another one add 6 both sides,ie: 15+6-1=10+6, this will be 16=16. ok.

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• • Chandan
  • 30 Aug

  It's very simple question lifted by you Mr krishna.... Simply you may take "-" menus sign before substracting number as 29-1=30; 29-(-1)=30, Similarly u can find out all given imputed through this way... Hope you got my point exactly!

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