The sum of all deviations of the data from its mean is

**A. ** always positive

**B. ** always negative

**C. ** zero

**D. ** non-zero integer

**Answer : ****Option C**

**Explaination / Solution: **

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Kamalam went to play a lucky draw contest. 135 tickets of the lucky draw were sold. If the probability of Kamalam winning is 1/9 , then the number of tickets bought by Kamalam is

**A. ** 5

**B. ** 10

**C. ** 15

**D. ** 20

**Answer : ****Option C**

**Explaination / Solution: **

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The total surface area of a hemi-sphere is how much times the square of its radius.

**A. ** π

**B. ** 4π

**C. ** 3π

**D. ** 2π

**Answer : ****Option C**

**Explaination / Solution: **

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If (sin *a* + cosec*a*)^{2}
+(cos *a* + sec *a*)^{2} = *k* + tan^{2}*a*
+ cot^{2}*a *, then the value of *k *is equal to

**A. ** 9

**B. ** 7

**C. ** 5

**D. ** 3

**Answer : ****Option B**

**Explaination / Solution: **

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The angle of depression of the top and bottom of 20 m tall building from the top of a multistoried building are 30° and 60° respectively. The height of the multistoried building and the distance between two buildings (in metres) is

**A. ** 20, 10√3

**B. ** 30, 5√3

**C. ** 20, 10

**D. ** 30, 10√3

**Answer : ****Option D**

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If slope of the line *PQ*
is 1/√3 then slope of the perpendicular bisector of *PQ* is

**A. ** √3

**B. ** -√3

**C. ** 1/√3

**D. ** 0

**Answer : ****Option B**

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If ΔABC is an isosceles triangle with ∠C = 90° and AC = 5 cm, then AB is

**A. ** 2.5 cm

**B. ** 5 cm

**C. ** 10 cm

**D. ** 5√2 cm

**Answer : ****Option D**

**Explaination / Solution: **

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The two tangents from an external points P to a circle with centre at O are PA and PB. If ∠APB = 70° then the value of ∠AOB is

**A. ** 100°

**B. ** 110°

**C. ** 120°

**D. ** 130°

**Answer : ****Option B**

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Which of the following
should be added to make *x*^{4} + 64 a perfect square

**A. ** 4*x*^{2}

**B. ** 16*x*^{2}

**C. ** 8*x*^{2}

**D. ** -8*x*^{2}

**Answer : ****Option B**

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Find the matrix X if 2X +

**A. **

**B. **

**C. **

**D. **

**Answer : ****Option B**

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**Preparation Study Material**- Physics Vol A1 (Study/Preparation)
- Physics Vol A2 (Study/Preparation)
- Physics Vol B1 (Study/Preparation)
- Physics Vol B2 (Study/Preparation)
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- Chemistry Vol A1 (Study/Preparation)
- Chemistry Vol A2 (Study/Preparation)
- Chemistry Vol B1 (Study/Preparation)
- Chemistry Vol B2 (Study/Preparation)
- Chemistry Vol B (Study/Preparation)
- Basic Maths (Study/Preparation)
- Basic Maths 2 (Study/Preparation)
- Maths (Study/Preparation)
- Maths 2 (Study/Preparation)