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CDS - Reasoning Test 363
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CDS - Reasoning Test 363
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  • Question 1/5
    1 / -0.33
    The ratio of the ages of A and B, 10 years ago, was 4:5 . Five years ago, the ratio of their ages was 9:11 . What will be the ratio of their ages 10 years from now?
    Solutions

    Given that the ratio of the ages of A and B, 10 years ago, was 4:5.

    Case-1: 10 years ago

    Let age of A = 4x

    age of B = 5x

    Case-2: 5 years ago

    age of A = 4x+5

    age of B = 5x+5

    According to question

    ⇒

    ⇒

    ⇒ x = 10

    Case-3: 10 years from now

    age of A = 4x+20 =

    age of B = 5x+20 =

    Ratio of their ages 10 years from now = 60:70 =6:7

  • Question 2/5
    1 / -0.33
    If Arjun finds that he is 12th from the right and 4th from the left , how many boys should be added to the queue so that there are 30 boys in the line?
    Solutions

    As per the Given:

    Clearly, number of boys in the line = (11+1+3) = 15.

    Number of boys to be added = (30-15) =15

    Hence, option C is correct.

  • Question 3/5
    1 / -0.33
    Three surfaces of a solid cube have been colour Red, Black and Pink. Now, the red colour is opposite to red, black colour exactly opposite to black and pink is opposite to the Pink colour. Thereafter, this cube is cut into 36 equal part such that 32 cube are of the same size while four others are of bigger size. Also, no face of any of the bigger cubes have black colour.

    How many cubes are there which have black colour on at least one of its surfaces?

    Solutions

    Clearly, number of cubes which have black colour on atleast one of its surfaces = 16+16 = 32

  • Question 4/5
    1 / -0.33
    An explanatory figure of dice is given. Study the figure and identify the correct dice formed by that figure.

    Solutions

    Look at the diagram shown above. If we fold the explanatory diagram in order to give it a shape of dice, we get

    ⇒ N is opposite of P and vice versa

    ⇒ M is opposite of R and vice versa

    ⇒ O is opposite of Q and vice versa

    Reject the diagram in option A, since M and R can not be on adjacent faces.

    Similarly, Reject the diagram in option B, since O and Q can not be on adjacent faces.

    Reject the diagram in option C, since P and N can not be on adjacent faces.

    Hence, option D is correct.

  • Question 5/5
    1 / -0.33
    Count the number of cubes in the given figure.

    Solutions
    In the given figure, 1 column containing 3 cube, 4 column containing 2 cube each and 3 column containing 1 cube each.

    Hence, Total number of cubes = (1 × 3) + (4 × 2) + (3 × 1) = 14.

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