CDS Questions

LCM HCF L1

What is the LCM of 2/3, 7/9, 14/15?

  1. 14/3
  2. 1/3
  3. 2/3
  4. 7/3

LCM HCF L1 Numbers L1

The sum of two positive integers is 52 and their LCM is 168. What is the ratio between the numbers?

  1. 2 : 3
  2. 5 : 4
  3. 7 : 6
  4. 7 : 8

LCM HCF L1

The HCF of two expressions p and q is 1. What is the reciprocal of their LCM?

  1. p + q
  2. p – q
  3. pq
  4. (pq)-1

LCM HCF L1 Polynomials L1

What is the LCM of x3 + 8, x2 + 5x + 6 and x3 + 4x2 + 4x?

  1. x (x + 2)2 (x + 3) (x2 - 2x + 4)
  2. x (x - 2)2 (x - 3) (x2 + 2x + 4)
  3. (x + 2)2 (x + 3) (x2 - 2x + 4)
  4. (x - 2)2 (x - 3) (x2 - 2x + 4)

Averages L1

A student on her first 3 tests receive an average score of N points. If she exceeds her previous average score by 20 points on her fourth test, then what is the average score for the first 4 tests?

  1. N + 10 
  2. N + 4
  3. N + 5 
  4. N + 20

Averages L1

In a class of 45 students, a boy is ranked 20th. When two boys joined, his rank was dropped by one. What is his new rank from the end?

  1. 25th
  2. 26th
  3. 28th
  4. 27th

Averages L1

In a garrison, there was food for 1000 soldiers for one month. After 10 days, 1000 more soldiers joined the garrison. How long would the soldiers be able to carry on with the remaining food?

  1. 10 days
  2. 25 days
  3. 20 days
  4. 15 days

Progressions L1

A contract on construction job specifies a penalty for delay in completion of the work beyond a certain date is as follows: Rs. 200 for the first day, Rs. 250 for the second day, Rs. 300 for the third day, etc. The penalty for each succeeding day being 50 more than that of the preceding day. How much penalty should the contractor pay if he delays the work by 10 days?

  1. Rs. 4950 
  2. Rs. 4250
  3. Rs. 650
  4. Rs. 3600

Progressions L1

A sum of Rs.700 has to be used to give seven cash prizes to the students of a school for their overall academic performance. If each prize is Rs.20 less than its preceding prize, what is the least value of the prize?

  1. Rs. 30
  2. Rs. 40
  3. Rs. 60
  4. Rs. 80

Quant Sets L1

There are 100 students in a particular class. 60% students play cricket, 30% student play football and 10% student play both the games. What is the number of students who play neither cricket nor football?

  1. 25
  2. 20
  3. 18
  4. 15

Quant Sets L1

Out of 120 applications for a post, 70 are male and 80 have a driver's license. What is the ratio between the minimum to maximum number of males having driver's license?

  1. 2 to 3
  2. 3 to 7
  3. 1 to 2
  4. 5 to 7

Geometry L1

In the figure given, LM is parallel to QR. If LM divides the triangle PQR such that area of trapezium LMRQ is two times the area of triangle PLM, then what is PL/PQ equal to?

  1. 1/3
  2. 1/√2
  3. 1/√3
  4. 1/2

Geometry L1

A circle of radius 10 cm has an equilateral triangle inscribed in it. The length of the perpendicular drawn from the centre to any side of the triangle is

  1. 5√3 cm
  2. 5 cm
  3. 10√3 cm
  4. 10 cm

Geometry L1

If A, B, C, D are the successive angles of a cyclic quadrilateral, then what is cos A + cos B + cos C + cos D equal to?

  1. 0
  2. 1
  3. 2
  4. 4

Geometry L1

What is the length of the perpendicular drawn from the centre of circle of radius r on the chord of length √3r?

  1. r/4
  2. r/2
  3. √2r
  4. r

Geometry L1

ABC is an isosceles triangle such that AB = BC = 8 cm and ∠ABC = 90°. What is the length of the perpendicular drawn from B on AC?

  1. 4√2 cm
  2. 4 cm
  3. 2 cm
  4. 2√2 cm

Geometry L1

In the figure given, ∠B = 38°, AC = BC and AD = CD. What is ∠D equal to?

  1. 26°
  2. 28°
  3. 38°
  4. 52°

Geometry L1

How many degrees are there in an angle which equals two-third of its complement?

  1. 60°
  2. 48°
  3. 45°
  4. 36°

Geometry L1

ABCD is a square. X is the mid-point of AB and Y is the mid-point of BC. Consider the following statements:

  1. Triangles ADX and BAY are congruent
  2. ∠DXA = ∠AYB
  3. DX is inclined at an angle 60° with AY
  4. DX is not perpendicular to AY

Which of the above statements are correct?

  1. 2, 3 and 4 only
  2. 1, 2 and 4 only
  3. 1, 3 and 4 only
  4. 1 and 2 only

Geometry L1

In the figure given below, M is the mid-point of AB and ∠DAB = ∠CBA and ∠AMC = ∠BMD. Then the triangle ADM is congruent to the triangle BCM by

  1. SAS rule
  2. SSS rule
  3. ASA rule
  4. AAA rule

Geometry L1

In the figure given below, ABC is a triangle with AB = BC and D is an interior point of the triangle ABC such that ∠DAC = ∠DCA.

 

Consider the following statements:

  1. Triangle ADC is an isosceles triangle.
  2. D is the centroid of the triangle ABC.
  3. Triangle ABD is congruent to the triangle CBD.

Which of the above statements are correct?

  1. 1 and 2 only
  2. 2 and 3 only
  3. 1 and 3 only
  4. 1, 2 and 3

Geometry L1

In the figure given below, PQ is parallel to RS and PR is parallel to QS, If ∠LPR = 35° and ∠UST = 70°, then what is ∠MPQ equal to?

  1. 55°
  2. 70°
  3. 75°
  4. 80°

Geometry L1

In the figure given below, PQR is a non-isosceles right-angled triangle, right angled at Q. If LM and QT are parallel and QT= PT, then what is ∠RLM equal to?

  1. ∠PQT
  2. ∠LRM
  3. ∠RML
  4. ∠QPT

Geometry L1

In the figure given below, ∠A = 80° and ∠ABC = 60°. BD and CD bisect angles B and C respectively. What are the values of x and y respectively?

  1. 10 and 130
  2. 10 and 125
  3. 20 and 130
  4. 20 and 125

Geometry L1

In the figure given below, PQRS is a parallelogram. PA bisects angle P and SA bisects angle S. What is angle PAS equal to?

  1. 60°
  2. 75°
  3. 90°
  4. 100°

Geometry L1

ABC is a triangle and D is a point on the side BC. If BC = 12 cm, BD = 9 cm and ∠ADC = ∠BAC, then the length of AC is equal to

  1. 5 cm
  2. 6 cm
  3. 8 cm
  4. 9 cm

Geometry L1

Two parallel chords of a circle whose diameter is 13 cm are respectively 5 cm and 12 cm in length. If both the chords are on the same side of the diameter, then the distance between these chords is

  1. 5.5 cm
  2. 5 cm
  3. 3.5 cm
  4. 3 cm

Geometry L1

Let P, Q, R be the mid-points of sides AB, BC, CA respectively of a triangle ABC. If the area of the triangle ABC is 5 square units, then the area of the triangle PQR is

  1. 5/3 square units
  2. 5/2√2 square units
  3. 5/4 square units
  4. 1 square unit

Geometry L1

Let ABCD be a rectangle. Let P, Q, R, S be the mid-points of sides AB, BC, CD, DA respectively. Then the quadrilateral PQRS is a

  1. Square
  2. Rectangle, but need not be a square
  3. Rhombus, but need not be a square
  4. Parallelogram, but need not be a rhombus

Mensuration L1

A village having a population of 4000 requires 150 litres of water per head per day. It has a tank measuring 20 m x 15 m x 6 m. The water of this tank will last for

  1. 3 days
  2. 2 days
  3. 4 days
  4. 5 days

Mensuration L1

A gardener has 1000 plants. He wants to plant them in such a way that the number of rows and the number of columns remains the same. What is the minimum number of plants that he needs more for this purpose?

  1. 34
  2. 24
  3. 32
  4. 14

Mensuration L1

A wall is of the form of a trapezium with height 4 m and parallel sides being 3 m and 5 m. What is the cost of painting the wall, if the rate of painting is Rs.25/- per square metre?

  1. Rs.800
  2. Rs.480
  3. Rs.400
  4. Rs.240

Mensuration L1

If three metallic spheres of radii 6 cm, 8 cm, and 10 cm are melted to form a single sphere, then the diameter of the new sphere will be

  1. 12 cm
  2. 24 cm
  3. 30 cm
  4. 36 cm

Mensuration L1

10 cylindrical pillars of a building have to be painted. The diameter of each pillar is 70 cm and the height is 4 m. What is the cost of painting at the rate of Rs.5 per square metre?

  1. Rs.400
  2. Rs.440
  3. Rs.480
  4. Rs.500

Mensuration L1

A cylindrical vessel of radius 4 cm contains water. A solid sphere of radius 3 cm is lowered into the water until it is completely immersed. The water level in the vessel will rise by

  1. 4.5 cm
  2. 2.25 cm
  3. 2 cm
  4. 1.5 cm

Mensuration L1

If the height of a right circular cone is increased by 200%, and the radius of the base is reduced by 50%, then the volume of the cone

  1. remains unaltered
  2. decreases by 25%
  3. increases by 50%
  4. increases by 25%

Mensuration L1

The radius of a sphere is equal to the radius of the base of a right circular cone, and the volume of the sphere is double the volume of the cone. The ratio of the height of the cone to the radius of its base is

  1. 3 : 2
  2. 1 : 2
  3. 2 : 1
  4. 2 : 3

Mensuration L1

The total outer surface area of a right circular cone of height 24 cm with a hemisphere of radius 7 cm upon its base is

  1. 327 π
  2. 307 π
  3. 293 π
  4. 273 π

Mensuration L1

The diameter of a metallic sphere is 6 cm. The sphere is melted and drawn into a wire of uniform circular cross-section. If the length of the wire is 36 m, then what is its radius equal to?

  1. 0.001 cm
  2. 0.01 cm
  3. 0.1 cm
  4. 1.0 cm

Mensuration L1

What is the number of wax balls, each of radius 1 cm, that can be molded out of a sphere of radius 8 cm?

  1. 1024
  2. 768
  3. 512
  4. 256

Mensuration L1

In the figure given below, AC is parallel to ED and AB = DE = 5 cm and BC = 7 cm. What is the area ABDE : area BDE : area BCD equal to?

  1. 10 : 5 : 7
  2. 8 : 4 : 7
  3. 2 : 1 : 2
  4. 8 : 4 : 5

Mensuration L1

In the figure given below, D is the diameter of each circle. What is the diameter of the shaded circle?

  1. D(√2 - 1)
  2. D(√2 + 1)
  3. D(√2 + 2)
  4. D(2 - √2)

Mensuration L1

A field is divided into four regions as shown in the given figure. What is the area of the field in square metres?

  1. 6 + 3√5/4
  2. 5 + 3√3/2
  3. 9 + 3√15/4
  4. 7 + 2√2

Mensuration L1

ABCD is a rectangle. The diagonals AC and BD intersect at O. If AB = 32 cm and AD = 24 cm, then what is OD equal to?

  1. 22 cm
  2. 20 cm
  3. 18 cm
  4. 16 cm

Mensuration L1

The radius of a circle is increased so that its circumference increases by 15%. The area of the circle will increase by

  1. 31.25%
  2. 32.25%
  3. 33.25%
  4. 34.25%

Mensuration L1

Ice-cream, completely filled in a cylinder of diameter 35 cm and height 32 cm, is to be served by completely filling identical disposable cones of diameter 4 cm and height 7 cm. The maximum number of persons that can be served in this way is

  1. 950
  2. 1000
  3. 1050
  4. 1100

Mensuration L1

In a trapezium ABCD, AB is parallel to CD and the diagonals intersect each other at O. What is the ratio of OA to OC equal to?

  1. Ratio of OB to OD
  2. Ratio of BC to CD
  3. Ratio of AD to AB
  4. Ratio of AC to BD

Mensuration L1

If the surface area of a sphere is reduced to one-ninth of the area, its radius reduces to

  1. One-fourth
  2. One-third
  3. One-fifth
  4. One-ninth

Mensuration L1

A copper wire when bent in the form of a square encloses an area of 121 cm2. If the same wire is bent in the form of a circle, it encloses an area equal to

  1. 121 cm2
  2. 144 cm2
  3. 154 cm2
  4. 168 cm2

Mensuration L1

If the radius of a right circular cone is increased by p% without increasing its height, then what is the percentage increase in the volume of the cone?

  1. p2
  2. 2p2
  3. p2/100
  4. p(2 + p/100)