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2 .A number is increased by x% ; to get back to the original number, it is to be reduced by ?

A.$10x \over 100+x $%

B.$x \over 100+x $%

C.x%

D.$100x \over 100+x $%

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3 .

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4 .If the base of right prism remains same and the lateral edges are halved, then its volume will be reduced by

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5 .

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6 .A man born in the year 1896 A.D. If in the year $x^2$ A.D. his age is x– 4, the value of x is ?

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7 .The mean of x and $1\over x$ is N. Then the mean of $x^2$ and $1\over x^2$ is ?

(A) $N^2$

(B)$N^2$–1

(C) $N^2$–2

(D) $4N^2$–2

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8 .The angle between the graph of the linear equation 239x– 239y+ 5 = 0 and the x–axis is

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9 .The perimeters of two similar triangles are 30 cm and 20 cm respectively. If one side of the first triangle is 9 cm. Determine the corresponding side of the second triangle

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10 .The perimeter of a sheet of paper in the shape of a quadrant of a circle is 75 cm. It's area would be (π=$22\over7$)

(A) 346.5 $cm^ 2$

(B) 693 $cm^ 2$

(C) 100 $cm^ 2$

(D) 512.25 $cm^ 2$

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