Home
Class 14
MATHS
Find the sum of first 21 odd numbers....

Find the sum of first 21 odd numbers.

A

213

B

231

C

441

D

144

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • NUMBER SYSTEM

    BHARDWAJ ACADEMY|Exercise CHAPTER EXERCISE |100 Videos
  • MENSURATION

    BHARDWAJ ACADEMY|Exercise CHAPTER EXERCISE (Previous Years. Questions)|33 Videos
  • PROBLEMS BASED ON ARITHMETIC

    BHARDWAJ ACADEMY|Exercise Chapter Exercise|72 Videos
BHARDWAJ ACADEMY-NUMBER SYSTEM -CHAPTER EXERCISE
  1. Find the value of 200 xx 439 + 200 xx 321 in standard form is

    Text Solution

    |

  2. Find the value of 1 ^(3) + 2 ^(3) + 3 ^(3) + ...+ upto 10th terms.

    Text Solution

    |

  3. Find the sum of first 21 odd numbers.

    Text Solution

    |

  4. Find the value of 9 + 10 + 11 + 12 + … + 21.

    Text Solution

    |

  5. If sum of six consecutive odd numbers is 168, then find the largest ...

    Text Solution

    |

  6. Find the sum of all prime numbers less than 20.

    Text Solution

    |

  7. 2x-13,2x-11, 2x-9,2x-7 are consecutive

    Text Solution

    |

  8. (4)/(16) - (1)/(8) = (3)/(8), (6)/(7) - (2)/(9) = (4)/(2) The above ...

    Text Solution

    |

  9. Find out the unit digit in (13)^(2003)

    Text Solution

    |

  10. A rectangle is divided horizontally into two equal parts. The upper p...

    Text Solution

    |

  11. If a ** b = a ^(2) + b ^(2) and a . b = a ^(2) - b ^(2), then the val...

    Text Solution

    |

  12. Find the value of(547527)/(82),if (547.527)/(0.0082)= x.

    Text Solution

    |

  13. Which of the fraction is least ?

    Text Solution

    |

  14. When the number 3^(99) is divided by 4, the remainder is

    Text Solution

    |

  15. Shown here are expressions given to Seema, Anees, Asha and Tessy with...

    Text Solution

    |

  16. If A = (3)/(4)div (5)/(6) , B = 3 div[ ( 4 div 5) div 6], C = [3 div...

    Text Solution

    |

  17. How many times will I be writing 2 if wrote down numbers from 11 to 1...

    Text Solution

    |

  18. The symbol drawn to any size means a + 4 and the symbol dra...

    Text Solution

    |

  19. Which of the following fractions (3)/(8), (4)/(5), (31)/(40), (9)/(20)...

    Text Solution

    |

  20. 2 ^(15) -1 is divisible by

    Text Solution

    |