Untitled

 2 mark

| -0.25 mark |

 60 minutes

Question 1:

A real number \(M\) is squared to give the value N. What is the minimum value of \(M + N\)?

Question 2:

If \( \alpha \) and \( \beta \) are the roots of the equation \( x+a+b=\frac{a b x}{a b+a x+b x} \), then what is \( (\alpha \beta+\alpha+\beta) \) equal to ?

Question 3:

What is the minimum value of \( p \) for which \( \frac{1}{532900}+\frac{\mathrm{p}^{2}}{266450}+\frac{\mathrm{p}^{4}}{523900} \) is an integer ?

Question 4:

N is the smallest 5-digit number which when divided by \(2,2^{2},2^{3},2^{4},\ldots,2^{n}\) leaves a remainder 1. What is the value of \(n\)?

Question 5:

What is the sum of all 3-digit numbers that give a remainder of 5 when they are divided by 50 ?

Question 6:

If the average of \( 64,69,72,75, x \) lies between 62 and 76 (excluding 62 and 76), then what is the number of possible integer values of x?

Question 7:

Let \( x, y, z \) be variables such that \(x+y+z=k\), where \(k\) is a constant. If \((x+z-y)\times(x-z+y)\) is proportional to \(yz\), then \((y+z-x)\) is proportional to:

Question 8:

Let \( p \) be the remainder when \( 7^{84} \) is divided by 342 and \( q \) be the remainder when \( 7^{84} \) is divided by 344. What is \( (p-q) \) equal to?

Question 9:

Consider a 2-digit number N. Let P be the product of the digits of the number. If \(P\) is added to square of the digit in the tens place of N, we get 84. If \(P\) is added to the square of the digit in the unit place of N, we get 60. What is the value of \(P+N\)?

Question 10:

A mixture of 100 L contains kerosene and turpentine oil in the ratio \( 3: 2 \). What is the minimum quantity of kerosene in litres (whole number) that should be mixed in the mixture so that the resulting mixture has \(20\%\) of kerosene?

Question 11:

A lamp is kept on a vertical pole. The height of the top of the lamp above the ground is \( \frac{5 \sqrt{3}}{2} \mathrm{~m} \). The perpendicular distances of the bottom of the pole from two adjacent walls meeting perpendicularly are 0.7 m and 2.4 m. What is the distance of the top of the lamp from the corner point of the walls on the ground?

Question 12:

C is the centre of a circle of radius \(20 \mathrm{~cm}\). AB is a chord of length \(32 \mathrm{~cm}\). E is a point on AB such that \(\mathrm{CE}=13 \mathrm{~cm}\). What is \(\mathrm{AE} \times \mathrm{EB}\) equal to?

Question 13:

The inside of a bowl is part of a sphere. When water is put into the bowl to a depth d, the water surface becomes a circle of radius 2d. What is the radius of the sphere?

Question 14:

In a triangle \(\mathrm{ABC}, \mathrm{AB}=2 \mathrm{~cm}, \mathrm{BC}=4 \mathrm{~cm}\) and \(\mathrm{AC}=3 \mathrm{~cm}\). The bisector of angle A meets BC at D and the bisector of angle B meets AD at E. What is \(\mathrm{AE}:\mathrm{ED}\) equal to?

Question 15:

In a triangle ABC, the bisector of angle A cuts BC at D. If AB + AC = 10 cm and BD:DC = 3:1, then what is the length of AC?

Question 16:

In a triangle \( \mathrm{ABC}, \mathrm{AB}+\mathrm{BC}=7 \cdot 1 \,\mathrm{cm} \), \( \mathrm{BC}+\mathrm{CA}=12 \cdot 1 \,\mathrm{cm} \) and \( \mathrm{CA}+\mathrm{AB}=7 \cdot 2 \,\mathrm{cm} \). What is the area of the triangle?

Question 17:

The adjacent sides of a parallelogram are 10 cm and 8 cm and the angle between them is \( 150^{\circ} \). What is the area of the parallelogram ?

Question 18:

The measure of an angle formed by the bisectors of the angles A and C of the triangle ABC is \( 130^{\circ} \). What is the measure of the angle B ?

Question 19:

What is \(\log_{10} 2000 + \log_{10} 400 + 4 \log_{10} 25 + 5 \log_{10} 20\) equal to?

Question 20:

If \( \frac{\log_{10}(100001-4^{x})}{5-x}=1 \), then what is \( x \) equal to?

Question 21:

If \( 2 \sin^{4} \alpha + 2 \cos^{4} \alpha - 1 = 0 \), where \( 0 \leq \alpha < \pi/2 \), then what is \( \sin 2\alpha + \cos 2\alpha \) equal to?

Question 22:

Consider the following : I. \(1-\sin^{6} \alpha=\cos^{2} \alpha(\cos^{4} \alpha-3\cos^{2} \alpha+3)\) II. \(\cos^{8} \alpha-\sin^{8} \alpha=2\sin^{2} \alpha(1-\cos^{4} \alpha+\sin^{2} \alpha\cos^{2} \alpha)\) Which of the above is/are identities?

Question 23:

If \( p=\frac{1}{\operatorname{cosec} \theta+\cot \theta} \) and \( q=\operatorname{cosec} \theta \), then what is \( p^{2}-2 p q \) equal to?

Question 24:

Consider the following statements:
I. ( \( \operatorname{cosec} \alpha - \sec \alpha \) ) is always positive in the first quadrant.
II. ( \( \tan \alpha - \cot \alpha \) ) is always negative in the first quadrant.
Which of the statements given above is/are correct?

Question 25:

A tower subtends an angle \(60^{\circ}\) at a point A on the same level as the foot of the tower. B is a point vertically above A and \(AB = h\). The angle of depression of the foot of the tower, measured from B, is \(30^{\circ}\). What is the height of the tower?

Question 26:

What is \( \frac{\sin \theta}{1-\cot \theta}+\frac{\cos \theta}{1-\tan \theta}(\theta \neq \pi / 4) \) equal to?

Question 27:

The length of an arc of a circle of radius 4 cm is \( \pi \mathrm{cm} \). What is the magnitude of the angle subtended by the arc at the centre?

Question 28:

If \( \cot^{2} \theta - 3\sqrt{3}\cot\theta + 6 = 0 \), where \( \frac{\pi}{6} \leq \theta < \frac{\pi}{2} \), then what is a value of \( \sin\theta + \cos2\theta \)?

Question 29:

Which of the following equations is/are possible? I. \( \sin^{2} \theta = \frac{(x+y)^{2}}{4xy} \), where \(x, y\) are positive unequal real quantities. II. \( \sin \theta + \cos \theta = x + \frac{1}{x} \), where \(x\) is a positive real quantity. Select the correct answer using the code given below:

Question 30:

If \( m^{2}(\sin \theta-1)+n^{2}(\sin \theta+1)=0 \), where \(0<\theta<\frac{\pi}{2}\), then what is \(\left(m^{2}+n^{2}\right)\cos \theta-\left(m^{2}-n^{2}\right)\cot \theta\) equal to?

Question 31:

If \( \sin \alpha+\cos \alpha=\sqrt{2} \), where \( 0<\alpha<\frac{\pi}{2} \), then what is \( \sin^{3}\alpha-\cos^{3}\alpha \) equal to?

Question 32:

What is \( (1+\cot \alpha-\operatorname{cosec} \alpha)(1+\tan \alpha+\sec \alpha) \) equal to?

Question 33:

If \( \tan \theta=\frac{\sin \alpha-\cos \alpha}{\sin \alpha+\cos \alpha} \), where \( \theta \) and \( \alpha \left(\alpha \neq \frac{\pi}{4}\right) \) are acute angles, then what is \( \sqrt{2} \sin \theta \) equal to?

Question 34:

For how many values of \( \alpha \) does the expression \( (\sin \alpha+2)(\sin \alpha+4)(\sin \alpha-2)(\sin \alpha-4) \) become zero?

Question 35:

What is the value of x, where \(0 \leq x < 30^{\circ}\), satisfying \(\tan 3x \tan 6x = 1\)?

Question 36:

What is
\[
\frac{(a-b)^{2}}{(b-c)(c-a)} + \frac{(b-c)^{2}}{(c-a)(a-b)} + \frac{(c-a)^{2}}{(a-b)(b-c)} - 3
\]
equal to, where \( a \neq b \neq c \)?

Question 37:

Given that \( \frac{100 \times 99 \times 98 \times \ldots \times 3 \times 2 \times 1}{100^{\mathrm{n}}} \) is an integer. What is the largest value of n for which this is true?

Question 38:

A man starting from a place P went x metre (x>120 m) East before turning South. He went 40 m straight before turning to West. He went 60 m to reach a place Q. From Q he went 200 m North and reached a place R. If PR = 200 m, then what is x equal to?

Question 39:

If \( x^{2}+y^{2}+z^{2}=3 \), where \( x, y \) and \( z \) are integers, then how many values can \( x y+y z+z x \) have?

Question 40:

If \( x, y, z \) are real numbers such that \( x+y+z=10 \) and \( x y+y z+z x=18 \), then what is the value of \( x^{3}+y^{3}+z^{3}-3 x y z \)?

Question 41:

What is \( \sqrt{17-4 \sqrt{15}}+\sqrt{8-2 \sqrt{15}} \) equal to ?

Question 42:

What is the maximum value of the sum of the numbers \( 36,33,30,27,24, \ldots \) ?

Question 43:

There are two natural numbers \( m \) and \( n (m>n) \). When \( m \) is divided by 12, it leaves a remainder 4. When \( n \) is divided by 12, it leaves a remainder 6. Which of the following statements is/are correct?\nI. The remainder when \( m + n \) is divided by 12 is 10.\nII. The remainder when \( m - n \) is divided by 12 is 10.

Question 44:

If \( (x+y):(y+z):(z+x)=3:5:6 \) and \( x+y+z=14 \), then what is \( x^2+y^2+z^2 \) equal to?

Question 45:

The ratio of sum of two numbers to their difference is \( 5: 1 \). What is the ratio of the sum of their squares to the difference of their squares?

Question 46:

Travelling at \( 3 / 5^{\text{th}} \) of his usual speed, a man is late by 20 minutes. What is the usual time if he travels with his usual speed?

Question 47:

What is the remainder when \( 2^{\mathrm{p}}-1 \) is divided by \( p \), where \( p>5 \) is a prime number?

Question 48:

What is the number of factors of \( 24^{3}-16^{3}-8^{3} \)?

Question 49:

What is the least number of complete years in which a sum of money put out at \(20\%\) compound interest (compounded annually) will be more than doubled?

Question 50:

A train of certain length takes time \( t \) to pass completely through a station of length \( x \). The same train with same speed takes time \( 2t \) to pass completely through another station of length \( y \). What is the time taken by the train to pass completely through a station of length \( x + y \)?