Exams Questions and Answers

Q:

One of the roots of the equation $x^{2} - 6 x + k = 0$ is x = 2. The other root is

A) x = -1	B) x = 4
C) x = -4	D) x = 1

Answer & Explanation Answer: B) x = 4

Explanation:

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Q:

The basic operations performed by a computer are

A) Logical operation	B) Storage and relative
C) Arithmetic operation	D) All the above

Answer & Explanation Answer: D) All the above

Explanation:

The_basic_operations_performed_by_a_computer1537941097.png image

The basic operations performed by a computer are Arithmetic operation, Logical operation and Storage and relative.

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Q:

Divide Rs. 1301 between A and B, so that the amount of A after 7 years is equal to the amount of B after 9 years, the interest being compounded at 4% per annum.

A) Rs.625	B) Rs.626
C) Rs.286	D) Rs.627

Answer & Explanation Answer: A) Rs.625

Explanation:

Let the two parts be Rs. x and Rs. (1301 - x).

$x {(1 + \frac{4}{100})}^{7} = (1301 - x) {(1 + \frac{4}{100})}^{9}$

$\frac{x}{(1301 - x)} = {(1 + \frac{4}{100})}^{2} = (\frac{26}{25} * \frac{25}{26})$

=> 625x=676(1301-x)

1301x=676 x 1301x=676.
So,the parts are rs.676 and rs.(1301-676)i.e rs.676 and rs.625

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Q:

At what time between 3 and 4 o’clock will the minute hand and the hour hand are on the same straight line but facing opposite directions ?

A) 3:15 2/8	B) 3:49
C) 3:49 1/11	D) 3:51

Answer & Explanation Answer: C) 3:49 1/11

Explanation:

On straight line means 180 degree angle.
180 = 11/2 min – 30 hrs
180 = 11/2 m – 30 × 3
180 = 11/2 m – 90
(180 + 90) 2 = 11 m
m = 540/11 = 49 1/11 minutes.

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Q:

Should a total ban be put on traping wild animals?

Arguments:

1. Yes. Trappers are making a lot of money
2. No. Bans on hunting and trapping are not effective

A) Only 1 is true	B) Only 2 is true
C) Either 1 or 2 is true	D) Neither 1 or 2 is true

Answer & Explanation Answer: D) Neither 1 or 2 is true

Explanation:

Ban is necessary to protect our natural envoirnment .So none of the argument is strong enough

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Q:

What is the full form of GDP

A) Gross domestic product	B) Global domestic Ratio
C) Gross depository revenue	D) Global depository receipts

Answer & Explanation Answer: A) Gross domestic product

Explanation:

GDP full form is Gross domestic product.

It is a measurement of a nation’s overall economic activity.

GDP is the monetary value of all the finished goods and services produced within a country's borders in a specific time period.

gdp_full_form_is1536139309.jpg image

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Q:

A wheel makes 1000 revolutions in covering a distance of 88 km. Find the radius of the wheel.

A) 14	B) 13
C) 12	D) 11

Answer & Explanation Answer: A) 14

Explanation:

Distance covered in one revolution = $\frac{88 \times 1000}{1000}$ = 88m.

$2 {πR}^{2} = 88 \Rightarrow 2 \times \frac{22}{7} \times R = 88 \Rightarrow R = 88 \times \frac{7}{44}$

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Q:

Solve the missing number puzzle?

number_puzzle31533710656.jpg image

Answer

Here in the above puzzle,

Consider the columns.

Column 1 = Row 1 + Row 2 = Row 3

That is,

44 + 12 = 56

Similarly,

48 + 30 = 78

Hence, 14 + 51 = 65.

Hence, the missing number in the given puzzle = 65.

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