
31)The mean of 20, 30, 38, 40, 50, 56, 60 is:
32)If the equations \( x + 2y = 5 \) and \( 3x + ky = 10 \) are inconsistent, then the value of k is:
33)If the pair of linear equations \( a_1x + b_1y + c_1 = 0 \) and \( a_2x + b_2y + c_2 = 0 \) represent coincident lines, then:
34)From the top of a tower 60 meters high, the angle of depression of an object is 60°, then the distance of the object from the base of the tower is:
35)The angle of elevation of the top of a building from a point 10 meters away from the base is 60°, then the height of the building is:
36)\( 5 + \sqrt{7} \) is:
37)If \( x, y, z \) are distinct prime numbers, then the H.C.F. of \( x^2 y^3 z \) and \( x^3 y z^2 \) is:
38)The value of \( \log_3 81 \) is:
39)What is the median of 18, 14, 6, 7, 8?
40)If the mean of \( x, y, 3, 4 \) is 5, then \( x + y = ? \)
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