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Q:

How many combinations of two-digit numners having 8 can be made from the following numbers?

8, 5, 2, 1, 7, 6

A) 10 B) 6
C) 9 D) 11
 
Answer & Explanation Answer: D) 11

Explanation:

The possibe two-digit numbers are: 88, 85, 82, 81, 87, 86, 58, 28, 18, 78, 68

These are 11 in number

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Q:

In the following series of numbers, howmany 1, 3, 7 have appeared together. 7 being in middle and 1, 3 on either side of ??

2  9  7  3  1  7  3  7  7  1  3  3  1  7  3  8  5  7  1  3  7  7  1  7  3  9  0  6

A) 4 B) 5
C) 3 D) More than 5
 
Answer & Explanation Answer: C) 3

Explanation:

3  1  7  3  7

3  1  7  3  8

7  1  7  3  9

At these places 1, 7, 3 appeared together

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Q:

what does the term 'Lithosphere' refer to

A) Interior of the earth B) Crust of the earth
C) Plants and animals D) None of the above
 
Answer & Explanation Answer: B) Crust of the earth

Explanation:
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Filed Under: World Geography

Q:

If 2 tables and 3 chairs cost Rs, 3500 and 3 tables and 2 chairs cost Rs. 4000, then how much does a table cost ?

A) 500 B) 1000
C) 1500 D) 2000
 
Answer & Explanation Answer: B) 1000

Explanation:

Let the cost of a table and that of a chair be Rs. x and Rs, y respectively.

Then, 2x + 3y = 3500 ...(i)

and 3x + 2y = 4000 .....(ii)

solving (i) and (ii) we get x = 1000, y = 500 

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Filed Under: Simplification

Q:

How does the Sun get its energy

A) From gravitational pressure B) From nuclear fission
C) From nuclear fusion D) None of the above
 
Answer & Explanation Answer: C) From nuclear fusion

Explanation:
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Filed Under: World Geography

Q:

Who discovered the solar system

A) Copernicus B) Kepler
C) Aryabhatta D) Newton
 
Answer & Explanation Answer: A) Copernicus

Explanation:
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Filed Under: World Geography

Q:

Cathode rays have

A) mass only B) charge only
C) no mass and no charge D) mass and charge both
 
Answer & Explanation Answer: D) mass and charge both

Explanation:
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Filed Under: Chemistry

Q:

Cathode rays are 

A) electromagnetic wave B) stream of alpha particle
C) stream of electrons D) radiations
 
Answer & Explanation Answer: C) stream of electrons

Explanation:
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Filed Under: Chemistry