Find the remainder when the number 1234567...4481 is divided by 45.
(a) 36
(b) 31
(c) 44
(d) 43

• we can use the formula n*(n+1)/2 to calculate the total natural number
  which is =4481(4482)/2=10041921
  then divide =>10041921/45=>36 as reminder
• 9 years agoHelpfull: Yes(11) No(5)
• consider only last 3 digit 481
  on dividing 481 by 45 we get 31 remainder
  
• 9 years agoHelpfull: Yes(6) No(7)
• to be divisible by 45 no. must be ending with 0 or 5
  so only subtracting 36 and 31 can make last digit 0 or 5
  so ans is one of them
• 9 years agoHelpfull: Yes(3) No(0)
• why are we only taking the the last three digits??? we can even consider the last two digits also...
• 9 years agoHelpfull: Yes(2) No(1)
• .......no explaination -_-
• 9 years agoHelpfull: Yes(0) No(1)
• please any one explain it clearly...
  
• 9 years agoHelpfull: Yes(0) No(0)