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Q:

What is the compound interest earned at the end of 3 years?

I. Simple interest earned on that amount at the same rate and for the same period is Rs. 4500.

II.The rate of interest is 10 p.c.p.a.

III.Compound interest for 3 years is more than the simple interest for that period by Rs.465.

A) I and II only B) II and III only
C) I and III only D) Either II or III only

Answer:   D) Either II or III only



Explanation:

 

 

 

 

 

 

I. gives, S.I for 3 years = Rs. 4500.

 

 

 

II. gives, Rate = 10% p.a.

 

 

 

III. gives, (C.I.) - (S.I.) = Rs. 465.

 

 

 

Clearly, using I and III we get C.I. = Rs. (465 + 4500).

 

 

 

Thus, II is redundant.

 

 

 

Also, from I and II, we get sum =

 

 

 

100 x 4500

 

 

 

= 15000.

 

 

 

10 x 3

 

 

 

Now C.I. on Rs. 15000 at 10% p.a. for 3 years may be obtained.

 

 

 

Thus, III is redundant.

 

 

 

Either II or III is redundant.

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What is the value of (2/3 +tan45° ) ?

A) (1+√6)/√3 B) (2+√3)/√3
C) 4/√3 D) √3+2
 
Answer & Explanation Answer: B) (2+√3)/√3

Explanation:
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Find the volume (in cub.cm) of a sphere of diameter 42 cm

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C) 38808 D) 13371
 
Answer & Explanation Answer: C) 38808

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The area of a semicircle is 308 sq.cm. Calculate its perimeter (in cm)

A) 144 B) 49
C) 98 D) 72
 
Answer & Explanation Answer: D) 72

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If the length of one side and the diagonal of a rectangle are 8 cm and 17 cm respectively, then find its perimeter

A) 92 B) 48
C) 46 D) 96
 
Answer & Explanation Answer: C) 46

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Q:

If x = [1/(√5 + √3)], y = [1/(√7 + √5)] and z = [1/(√7 + √3)], then what is the value of (x + y + z)?

A) 3/4(√7 – √3) B) √5 – √3
C) √7 + √5 D) 1/2(√7 + √3)
 
Answer & Explanation Answer: A) 3/4(√7 – √3)

Explanation:
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Q:

Rahul’s salary is 40% of Mohit’s salary. If Rahul’s salary is increased by 60% and Mohit’s salary is decreased by 20%, then Rahul’s salary will be how much percentage of Mohit’s salary?

A) 80 B) 100
C) 105 D) 64
 
Answer & Explanation Answer: A) 80

Explanation:
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Q:

An isosceles triangle ABC has sides AB = AC. If side BA is produced to D in such a manner that AC=AD. Then what will the measure of the angle BCD?

A) π6 B) π3
C) 2π3 D) π2
 
Answer & Explanation Answer: D) π2

Explanation:
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Q:

Choose the CORRECT option if the two sides of a triangle is of length 4 cm and 10 cm and the length of its third side is a cm.

A) a<6 B) 6
C) a>5 D) 5
 
Answer & Explanation Answer: B) 6

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