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Mathematical Series Questions for Competitive Exams

5 months ago 155.7K Views
Q :  

AB is a chord to a circle and PAT is the tangent to the circle at A. If ∠BAT=75° and ∠BAC=45° and C being a point on the circle, then ∠ABC is equal to

(A) 40°

(B) 45°

(C) 60°

(D) 70°

Correct Answer : C

Q :  

G is the centroid of ΔABC. The medians AD and BE intersect at right angles. If the lengths of AD and BE are 9 cm and 12 cm respectively; then the length of AB (in cm) is?

(A) 11

(B) 10

(C) 10.5

(D) 9.5

Correct Answer : B

Q :  

The length of the chord of a circle is 8 cm and perpendicular distance between center and the chord is 3 cm. Then the radius of the circle is equal to:

(A) 4 cm

(B) 5 cm

(C) 6 cm

(D) 8 cm

Correct Answer : B

Q :  

In the given figure, DE‖BC and DE=1/3 BC if area of triangle ADE=20 sq. cm, then what is the area (in sq.cm) of the triangle DEC?

(A) 40

(B) 60

(C) 80

(D) 120

Correct Answer : A

Q :  A cow is tied with a 14 ft. long rope in the centre of a field. If the cow can graze the grass of 100 ft2 area per day. What will be the time taken by the cow in grazing the grass of whole field?

(A) 2 Days

(B) 18 Days

(C) 24 Days

(D) 6 Days

Correct Answer : D

Q :  Length and breadth of a rectangular field is 140 m. and respectively. Poles have to be fixed around this field at the distance of 5 m. How many such poles are required?

(A) 88

(B) 40

(C) 92

(D) 41

Correct Answer : C

Q :  A rectangular plot has the ratio of 5:3 between length and breath. If the perimeter of the plot is 320 mtr. What’s the area of the plot?

(A) 6000 sq.mtr.

(B) 12000 sq.mtr.

(C) 4500 sq.mtr.

(D) 18000 sq.mtr.

Correct Answer : A

Q :  Diagonal of a square is 12√2. Find the ratio between the area of this square and that of square drawn on diagonal.

(A) 2:1

(B) 1:1

(C) 1:2

(D) 1:3

Correct Answer : C

Q :  

A man standing on the bank of river observes that the angle subtended by a tree on the opposite bank is 60°. When he retrieves 36 m from the bank, he find that the angle is 30°. The breadth of the river is

(A) 15 m

(B) 18 m

(C) 16 m

(D) 11 m

Correct Answer : B

Q :  

The top of two poles of height 24m and 36 m are connected by a wire. If the wire makes an angle of 60° with the horizontal, then the length of the wire is 

(A) 6 m

(B) 8 √3 m

(C) 8 m

(D) 6√3 m

Correct Answer : B

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