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Twenty one times of a positive numer is ...

Twenty one times of a positive numer is less than its square by 100. The value of the positive number is

A

25

B

26

C

42

D

41

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Knowledge Check

  • Five times of a positive integer is equal to 3 less than twice the square of that number. The number is

    A
    3
    B
    13
    C
    23
    D
    33

  • The square root of a positive number less than 100 lies between :

    A
    0 and 1000
    B
    0 and 10
    C
    `-10 and 10`
    D
    `-100 and 100`

  • The sum of a positive integer and its square is 2450. The positive integer is

    A
    45
    B
    48
    C
    49
    D
    50

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