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Q. How many 3-digit numbers will be there which are divisible by 19?

  • Priya Sharma
  • Priya
  • 08 jul.
  • 270 Visto
  • 4 Respuestas
Your Answer

There should be 3 digit number,So First Digit=114 
Last digit which is divisible by 19 is 19*52=988 
  
Apply the formula of A.P....An=a+(n-1)d---------------Eq(1) 
  
Where An=988, a=114, common difference d= 19 
  
Applying above value in Eq(1) we get, 
  
988=114+(n-1)19 
  
874=19n-19 
  
893=19n 
  
n=893/19 
  
n=47

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