The sum of odd numbers between 0 and 10 is:

a) 15
b) 20
c) 25
d) 30
e) 35

• Option: c
  1+3+5+7+9=25
• 8 years agoHelpfull: Yes(5) No(1)
• common formula for sum of numbers is n/2(a+l)
  so here series is 1 3 5 7 9
  a=1,n=5,l=9
  so 5/2(1+9)=25
  
  if we have big series better to use formula
• 8 years agoHelpfull: Yes(1) No(1)
• Sum of first n even no. =n(n+1)
  And
  Sum of first n odd no..=n^2
  Ans=5^2=25
• 7 years agoHelpfull: Yes(1) No(1)
• 1+3+5+7+9=25
• 5 years agoHelpfull: Yes(1) No(0)
• C 1,3,5,7,9(add 25)
• 7 years agoHelpfull: Yes(0) No(1)
• 1+3+5+7+9=25
• 7 years agoHelpfull: Yes(0) No(1)
• [2a+(n-1)d]n/2,where n=5 & a=1
  
  c.25
• 7 years agoHelpfull: Yes(0) No(1)