Consider the sum of first 60 natural numbers.if every digit '6' is replaced by '8' what would be the increase and the new sum?

• thanks MAHESH for correcting my mistake
  soln will be
  sum of first 60 natural number=60(60+1)/2=30*61=1830
  every digit '6' is replaced by '8'
  i.e 6,16,26,36,46,56,60 are replaced by 8,18,28,38,48,58,80
  first six numbers are increased by 2 & 7th by 20
  increase in sum=2*6+20=32
  new sum=1830+32=1862
• 11 years agoHelpfull: Yes(3) No(0)
• sum of first 60 natural number=60(60+1)/2=30*61=1830
  every digit '6' is replaced by '8'
  i.e 6,16,26,36,46,56 are replaced by 8,18,28,38,48,58
  each increased by 2
  increase in sum=2*6=12
  new sum=1830+12=1842
• 11 years agoHelpfull: Yes(1) No(2)
• There is one number that Rakesh left out, that is 60, is replaced by 80, so the answer that Rakesh pointed out is 20 less
  
  The answer will be 1830 + 2*6 + 20 = 1862
  Answer is 1862
• 11 years agoHelpfull: Yes(0) No(0)