Number System


  1. Find the maximum number of trees which can be planted 20 m apart on the two sides of a straight road 1760 m long.









  1. View Hint View Answer Discuss in Forum

    Number of trees that can be planted on one side of road = (Length of road/gap between two trees ) + 1
    Number of trees that can be planted on one side of road = ( 1760/20 )+ 1

    Correct Option: D

    Number of trees that can be planted on one side of road = (Length of road/gap between two trees ) + 1
    Number of trees that can be planted on one side of road = ( 1760/20 )+ 1
    Number of trees that can be planted on one side of road = 88 + 1 = 89
    ∴ Threes on the both sides
    = 2 x 89 = 178


  1. When 1/7 of a number is subtracted from the number itself, it gives the same value as the sum of all the angels of a triangle. What is the number ?











  1. View Hint View Answer Discuss in Forum

    Let the number be P.
    According to the question,
    P - P/7 = 180

    Correct Option: B

    Let the number be P.
    According to the question,
    P - P/7 = 180
    ⇒ 6P/7 = 180
    ∴ P = 180 x 7/6 = 210



  1. In a division sum, the divisor is ten times the quotient and five times the remainder. If the remainder is 46, then find the dividend ?











  1. View Hint View Answer Discuss in Forum

    Divisor = 5 x 46 = 230
    Also, 10 x Quotient = 230
    ∴ Quotient = 23
    We know that
    Dividend = (Divisor x Quotient ) + Remainder

    Correct Option: C

    Divisor = 5 x 46 = 230
    Also, 10 x Quotient = 230
    ∴ Quotient = 23
    We know that
    Dividend = (Divisor x Quotient ) + Remainder
    ∴ Dividend = (230 x 23) + 46
    ∴ Dividend = 5290 + 46 = 5336