A boy added the natural numbers till he reach the addition 1000. after reaching the 1000 he noticed that he added one number double times . what was dat number

• Ans is 10.
  He added numbers from 1 to upto 44 so total =44*45/2=990 and add 10 one more time i.e=990+10=1000
• 10 years agoHelpfull: Yes(18) No(2)
• 1+2+3+.......+44=990
  so 10 is added to get 1000.
  so answer is 10.
• 9 years agoHelpfull: Yes(6) No(1)
• The sum of numbers from 1 to 44 is 990
  If 10 is added twice, the sum becomes 1000
  so the answer is 10
• 9 years agoHelpfull: Yes(3) No(0)
• the number is 45.
  1+2+3+............+98+99+100=955
  955+45=10000
  
• 9 years agoHelpfull: Yes(0) No(6)