Explore topic-wise MCQs in Arithmetic Ability.

This section includes 192 Mcqs, each offering curated multiple-choice questions to sharpen your Arithmetic Ability knowledge and support exam preparation. Choose a topic below to get started.

51.

In triangle ABC a straight line parallel to BC intersects AB and AC at D and E respectively. If AB = 2AD, then DE : BC is

A. : 3
B. : 1
C. : 2
D. : 3
Answer» D. : 3
52.

For a triangle ABC, D and E are two points on AB and AC such that AD = $$\frac{1}{4}$$ AB, AE = $$\frac{1}{4}$$ AC. If BC = 12 cm, then DE is :

A. cm
B. cm
C. cm
D. cm
Answer» D. cm
53.

In a ΔABC, ∠A + ∠B = 118°, ∠A + ∠C = 96°. Find the value of ∠A.

A.
B.
C.
D.
Answer» E.
54.

If in a triangle ABC, D and E are on the sides AB and AC, such that, DE is parallel to BC and $$\frac{{AD}}{{BD}}$$ = $$\frac{3}{5}$$. If AC = 4 cm, then AE is

A. .5 cm
B. .0 cm
C. .8 cm
D. .4 cm
Answer» B. .0 cm
55.

If the three angles of a triangle are: $${\left(x + 15 \right)^ \circ },$$$${\left({\frac{{6x}}{5} + 6} \right)^ \circ }$$and $${\left({\frac{{2x}}{3} + 30} \right)^ \circ }$$then the triangle is:

A. sosceles
B. quilateral
C. ight angled
D. calene
Answer» C. ight angled
56.

In ΔABC, DE || AC, D and E are two points on AB and CB respectively. If AB = 10 cm and AD = 4 cm, then BE : CE is

A. : 3
B. : 5
C. : 2
D. : 2
Answer» E.
57.

Let ABC be an equilateral triangle and AX, BY, CZ be the altitude. Then the right statement out of the four give responses is :

A. X = BY = CZ
B. X ≠ BY = CZ
C. X = BY ≠ CZ
D. X ≠ BY ≠ CZ
Answer» B. X ≠ BY = CZ
58.

In ΔABC, ∠C is an obtuse angle. The bisectors of the exterior angles at A and B meet BC and AC produced at D and E respectively. If AB = AD = BE, then ∠ACB = ?

A. 05°
B. 08°
C. 10°
D. 35°
Answer» C. 10°
59.

If the measures of the sides of triangle are (x2 - 1), (x2 + 1) and 2x cm, then the triangle would be :

A. quilateral
B. cute-angled
C. ight-Angled
D. sosceles
Answer» D. sosceles
60.

In ΔABC, ∠A + ∠B = 65°, ∠B + ∠C = 140°, then find ∠B.

A.
B.
C.
D.
Answer» C. 5°
61.

If ABC is an equilateral triangle and P, Q, R respectively denote the middle points of AB, BC, CA then

A. QR must be an equilateral triangle
B. Q + QR = PQR + AB
C. Q + QR = PR + 2AB
D. QR must be a right angled
Answer» B. Q + QR = PQR + AB
62.

In ΔABC, two points D and E are taken on the lines AB and BC respectively in such a way that AC is parallel to DE. Then ΔABC and ΔDBE are :

A. imilar only if D lies outside the line segment AB
B. ongruent only If D lies out side the line segment AB
C. lways similar
D. lways congruent
Answer» D. lways congruent
63.

In a ΔABC, AB = AC and BA is produced to D such that AC = AD. Then the ∠BCD is :

A. 00°
B.
C.
D.
Answer» E.
64.

In ΔPQR, S and T are point on sides PR and PQ respectively such that ∠PQR = ∠PST, If PT = 5 cm, PS = 3 cm and TQ = 3 cm, then length of SR is

A. cm
B. cm
C. $\frac{{31}}{3}$$ cm
D. $\frac{{41}}{3}$$ cm
Answer» D. $\frac{{41}}{3}$$ cm
65.

If two angles of a triangle are 21° and 38°, then the triangle is :

A. ight-angled triangle
B. cute-angled triangle
C. btuse-angled triangle
D. sosceles triangle
Answer» D. sosceles triangle
66.

In a ΔABC, AB = BC, ∠B = x° and ∠A = (2x - 20)°, Then ∠B is :

A.
B.
C.
D.
Answer» E.
67.

In a triangle ABC, BC is produced to D so that CD = AC. If ∠BAD = 111° and ∠ACB = 80°, then the measure of ∠ABC is:

A.
B.
C.
D.
Answer» E.
68.

If the sides of a right angled triangle are three consecutive integers, then the length of the smallest side is

A. units
B. units
C. units
D. units
Answer» B. units
69.

If angle bisector of a triangle bisects the opposite side, then what type of triangle is it?

A. ight angled
B. quilateral
C. sosceles and equilateral
D. sosceles
Answer» D. sosceles
70.

The angles of a triangle are in the ratio 2 : 3 : 7. The measure of the smallest angle is :

A.
B.
C.
D.
Answer» B. 0°
71.

In triangle ABC, ∠BAC = 75°, ∠ABC = 45°, $$\overline {BC} $$ is produced to D. If ∠ACD = x°, then $$\frac{x}{3}$$% of 60° is

A.
B.
C.
D.
Answer» E.
72.

In ΔABC and ΔDEF, AB = DE and BC = EF, then one can infer that ΔABC ≅ ΔDEF, when

A. BAC = ∠EFD
B. ACB = ∠EDF
C. ABC = 2∠DEF
D. ABC = ∠DEF
Answer» E.
73.

If each angle of a triangle is less than the sum of the other two, then the triangle is

A. btuse angled
B. cute or equilateral
C. cute angled
D. quilateral
Answer» C. cute angled
74.

ABC is an equilateral triangle and CD is the internal bisector of ∠C. If DC is produced to E such that AC = CE, then ∠CAE is equal to

A.
B.
C.
D.
Answer» E.
75.

ABC is an isosceles triangle inscribed in a circle. If AB = AC = 12$$\sqrt 5 $$ and BC = 24 cm then radius of circle is:

A. 0 cm
B. 5 cm
C. 2 cm
D. 4 cm
Answer» C. 2 cm
76.

The centroid of a triangle is G. If area of ΔABC = 72 sq. unit, then the area of ΔBGC is?

A. 6 sq. units
B. 4 sq. units
C. 6 sq. units
D. 8 sq. units
Answer» C. 6 sq. units
77.

Possible length of the sides of a triangle are:

A. cm, 3cm, 6cm
B. cm, 4cm, 5cm
C. .5cm, 3.5cm, 6cm
D. cm, 4cm, 9cm
Answer» C. .5cm, 3.5cm, 6cm
78.

The orthocenter of a triangle is the point where?

A. he medians meet
B. he altitudes meet
C. he right bisectors of the sides of
D. he bisectors of the angles
Answer» C. he right bisectors of the sides of
79.

In a triangle ABC, if ∠A + ∠C = 140° and ∠A + 3∠B = 180°, then ∠A is equal to:

A.
B.
C.
D.
Answer» D. 0°
80.

In a ΔABC, BC is extended upto D; ∠ACD = 120°, ∠B = $$\frac{1}{2}$$ ∠A, then ∠A is:

A.
B.
C.
D.
Answer» D. 0°
81.

G is the centroid of ΔABC. If AB = BC = AC, then measure of ∠BGC is:

A.
B.
C.
D. 20°
Answer» E.
82.

Let ΔABC and ΔABD be on the same base AB and between the same parallels AB and CD. Then the relation between areas of triangles ABC and ABD will be

A. ABD = $$\frac{1}{3}$$ ΔABC
B. ABD = $$\frac{1}{2}$$ ΔABC
C. ABC = $$\frac{1}{2}$$ ΔABD
D. ABC = ΔABD
Answer» E.
83.

In an isosceles triangle ΔABC, AB = AC and ∠A = 80°. The bisector of ∠B and ∠C meet at D. The ∠BDC is equal to.

A.
B. 00°
C. 30°
D.
Answer» D. 0°
84.

If in ΔABC, DE || BC, AB = 7.5 cm BD = 6 cm and DE = 2 cm then the length of BC in cm is:

A. cm
B. cm
C. 0 cm
D. 0.5 cm
Answer» D. 0.5 cm
85.

Incenter of ΔABC is I. ∠ABC = 90° and ∠ACB = 70°. ∠BIC is:

A. 15°
B. 00°
C. 10°
D. 05°
Answer» C. 10°
86.

PQR is an equilateral triangle. MN is drawn parallel to QR such that M is on PQ and N is on PR. If PN = 6 cm, then the length of MN is:

A. cm
B. cm
C. 2 cm
D. .5 cm
Answer» C. 2 cm
87.

Length of the sides of a triangle are a, b and c respectively. If a2 + b2 + c2 = ab + bc + ca then the triangle is:

A. sosceles
B. quilateral
C. calene
D. ight-angled
Answer» C. calene
88.

In ΔPQR, straight line parallel to the base QR cuts PQ at X and PR at Y. If PX : XQ = 5 : 6, then XY : QR will be

A. : 11
B. : 5
C. 1 : 6
D. 1 : 5
Answer» B. : 5
89.

In a ΔPQR, ∠Q = 55° and ∠R = 35°. Find the ratio of angles subtended by side QR on circumcenter, incenter and orthocenter of the triangle.

A. : 2 : 1
B. : 2 : 4
C. : 2 : 4
D. : 3 : 2
Answer» E.
90.

ΔABC is similar to ΔDEF. If the sides of ΔABC, that is AB, BC and CA, are 3, 4 and 5 cms respectively, what would be the perimeter of the ΔDEF, if the side DE measures 12 cms ?

A. 4 cms
B. 0 cms
C. 6 cms
D. 8 cms
Answer» E.
91.

The side BC of a triangle ABC is proceed to D. If ∠ACD = 112° and ∠B = $$\frac{3}{4}$$ ∠A, then the measure of ∠B is:

A.
B.
C.
D.
Answer» D. 5°
92.

ABC is an equilateral triangle. Points D, E and F are taken as the mid-point on sides AB, BC, AC respectively, so that AD = BE = CF. Then AE, BF, CD enclosed a triangle which is:

A. quilateral
B. sosceles triangle
C. ight angle triangle
D. one of these
Answer» B. sosceles triangle
93.

In ΔABC, the line parallel to BC intersect AB & AC at P & Q respectively. If AB : AP = 5 : 3, then AQ : QC is:

A. : 2
B. : 2
C. : 5
D. : 3
Answer» B. : 2
94.

In ΔABC, ∠B = 60° and ∠C = 40°; AD and AE are respectively the bisector of ∠A and perpendicular on BC. The measure of ∠EAD is:

A. °
B.
C.
D.
Answer» D. 2°
95.

In ΔABC and ΔDEF, if ∠A = 50°, ∠B = 70°, ∠C = 60°, ∠D = 60°, ∠E = 70° and ∠F = 50°, then

A. ABC ∼ ΔFED
B. ABC ∼ ΔDFE
C. ABC ∼ ΔEDF
D. ABC ∼ ΔDEF
Answer» B. ABC ∼ ΔDFE
96.

In ΔABC, ∠B = 70° and ∠C = 30°, AD and AE are respectively the perpendicular on side BC and bisector of ∠A. The measure of ∠DAE is:

A.
B.
C.
D.
Answer» E.
97.

In ΔABC and ΔPQR, ∠B = ∠Q, ∠C = ∠R. M is the midpoint on QR, If AB : PQ = 7 : 4, then $$\frac{{{\text{area}}\,\left( {\vartriangle ABC} \right)}}{{{\text{area}}\,\left( {\vartriangle PMR} \right)}}$$is :

A. $\frac{{35}}{8}$$
B. $\frac{{35}}{{16}}$$
C. $\frac{{49}}{{16}}$$
D. $\frac{{49}}{8}$$
Answer» E.
98.

A point D is taken on the side BC of a right-angled triangle ABC, where AB is hypotenuse. Then

A. B2 + CD2 = AD2 + BC2
B. D2 + BD2 = 2AD2
C. B2 + AC2 = 2AD2
D. B2 = AD2 + BC2
Answer» B. D2 + BD2 = 2AD2
99.

ABC is a right-angled triangle with AB = 6 cm and BC = 8 cm. A circle with center O has been inscribed inside ΔABC. The radius of the circle is

A. cm
B. cm
C. cm
D. cm
Answer» C. cm
100.

G is the centroid of the equilateral ΔABC. If AB = 10 cm then length of AG is ?

A. $\frac{{5\sqrt 3 }}{3}\,cm$$
B. $\frac{{10\sqrt 3 }}{3}\,cm$$
C. $5\sqrt 3 \,cm$$
D. $10\sqrt 3 \,cm$$
Answer» C. $5\sqrt 3 \,cm$$