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Numerical Ability Test - 10
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Numerical Ability Test - 10
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  • Question 1/10
    5 / -1

    What is the value of √180?
    Solutions

    Given:

    The given number is √180.

    Calculation:

    According to the question, we have,

    √180 = √(3 × 3 × 2 × 5 × 2)

    ⇒ √180 = 3 × 2√5

    ⇒ 6√5

    ∴ The value of √180 is 6√5.

  • Question 2/10
    5 / -1

    x32.56=100x then 'x' is equal to :
    Solutions

    Calculation:

    x32.56=100x

    x4/3=100×2.56

    x=2563/4

    x = 162 × 3/4 = 42 × 3/2

    x = 43 = 64

    Additional InformationFormula used:

    a× an = a(m + n)

    a÷ an = a(m - n)

    (am)= amn

  • Question 3/10
    5 / -1

    16√n = √1600 + √576, find the value of n? 

    Solutions

    Given:

    16√n = √1600 + √576

    Calculation:

    According to the question,

    ⇒ 16√n = √1600 + √576

    ⇒ 16√n = 40 + 24

    ⇒ √n = 64/16

    ⇒ √n = 4

    n = (4)2 = 16

    ∴ Value of n is 16

  • Question 4/10
    5 / -1

    The value of [5(813+2713)3]14 is
    Solutions

    Formula used:

    (ax)y = axy

    Calculation:

    [5(813+2713)3]14

    ⇒ [5((23)13+(33)13)3]14

    ⇒ [5((2)+(3))3]14

    ⇒ [5(2+3)3]14 

    ⇒ [5×(5)3]14

    ⇒ [(5)4]14 = 5

    ∴ The value of [5(813+2713)3]14 is 5.

  • Question 5/10
    5 / -1

    If 1252 × (625)-0.25 = 5x, then the value of x is
    Solutions

    Concept used:

    ab × ac = ab + c

    If ab = ac then b = c

    (ab)c = ab × c

    Calculation:

    1252 × (625)-0.25 = 5x

    ⇒ 53 × 2 × 5× -0.25 = 5x

    ⇒ 5× 5-1 = 5x

    ⇒ 56 - 1 = 5x

    ⇒ 55 = 5x

    ⇒ x = 5

  • Question 6/10
    5 / -1

    Find the value of x:

    23 × 34 × 1080 ÷ 15 = 6x

    Solutions

    Given,

    23 × 34 × 1080 ÷ 15 = 6x

    ⇒ 23 × 34 × 72 = 6x

    ⇒ 23 × 34 × (2 × 62) = 6x

    ⇒ 24 × 34 × 62 = 6x

    ⇒ (2 × 3)4 × 62 = 6x           [∵ xm × ym = (xy)m]

    ⇒ 64 × 62 = 6x

    ⇒ 6(4 + 2) = 6x

    ⇒ x = 6

  • Question 7/10
    5 / -1

    If (56/x) = √(196/324) , find the value of x
    Solutions

    (56/x) = √(196/324)​

    ⇒ (56/x) = 14/18

    ⇒ x = (56 × 18)/14

    ⇒ x = 72

    ∴ The value of x is 72.

  • Question 8/10
    5 / -1

    The cube root of 3375 is equal to:
    Solutions

    ∛3375

    ∛(3 × 3 × 3 × 5 × 5 × 5)

    3 × 5 = 15

  • Question 9/10
    5 / -1

    The square of 2112 is -
    Solutions

    Given:

    The square of 2112 

    Formula used:

    (a + b)= a2 + b2 + 2ab

    Calculation:

    (2100 + 12)2

    ⇒ (2100)2 + (12)2 + 2 × 2100 × 12

    ⇒ 4410000 + 144 + 50400

    ⇒ 4460544

    ∴ The square of 2112 is 4460544.

  • Question 10/10
    5 / -1

    Find the value of x

    292 - 252 = 63 + x

    Solutions

    Concept used:

     

    Calculations:

    ⇒ 292 - 252 = 63 + x

    ⇒ 841 - 625 = 63 + x

    ⇒ 216 = 63 + x

    ⇒ 216 - 216 = x

    ⇒ x = 0

    ∴ The value of x is 0.

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