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Q:

Rajeev's age is four more than the age of Shilpa. The age of Shilpa can be obtained by subtracting four times her age 4 years ago from the four times her age after 4 years. What was Rajeev's age before 4 years ?

A) 36 years	B) 28 years
C) 32 years	D) 40 years

Answer & Explanation Answer: C) 32 years

Explanation:

Let Shilpa's present age is p years

According to question,

p = 4(x+4) – 4(x–4)

p = 4x+16 – 4x+16

p = 32

Shilpa's present age = 32 years

Rajeev is four years older than Shilpa

=> Shilpa's present age = Rajeev's age 4 years before.

=> Rajeev's age 4 years before = 32 years.

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Filed Under: Problems on Ages
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Q:

What approximate value will come in place of question mark (?) in the following question ?

(49.001)² = ?

A) 2500	B) 2400
C) 2600	D) 2300

Answer & Explanation Answer: B) 2400

Explanation:

Given (49.001)² = ?

=> =~ 49 x 49

=~ 2401

=~ 2400

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Filed Under: Mathematical Operations
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Q:

Who became the first wicketkeeper in world cricket to effect 100 stumpings in ODI's in 2017 ?

A) Mahendra Singh Dhoni	B) Kumar Sangakkara
C) Mark Boucher	D) Adam Gilchrist

Answer & Explanation Answer: A) Mahendra Singh Dhoni

Explanation:

Former India captain Mahendra Singh Dhoni became the first wicketkeeper in world cricket to effect 100 stumpings in One Day Internationals. He broke the record of former Sri Lankan captain Kumar Sangakkara.

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Filed Under: General Awareness
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Q:

A man can row 8 kmh in still water. If the river is running at 2 kmh, it takes 4 hrs more upstream than to go downstream for the same distance. Then the distance is given by

A) 54 kms	B) 32 kms
C) 45 kms	D) 60 kms

Answer & Explanation Answer: D) 60 kms

Explanation:

Let the distance be d.

$\frac{d}{8 - 2} - \frac{d}{8 + 2} = 4$

=> 2d = 120

=> d = 60 kms.

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Filed Under: Boats and Streams
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Q:

What is the Probability of all cars not clashing each other ?

triangular1504515041.jpg image

A) 1/8	B) 0
C) 1/4	D) 1

Answer & Explanation Answer: C) 1/4

Explanation:

Non collision can happen only when all the cars move in same direction.

That is either all cars moving in clockwise direction or all cars moving in anti clockwise direction.
P(all cars not colliding)

= P(all cars moving in the same direction)

= P(all cars moving in clockwise direction) + P(all cars moving in anticlockwise direction)

= [p(A --> C) x p(C --> B) x p(B --> A)] + [p(A --> B) x p(B --> C) x p(C --> A)]

= [1/2 x 1/2 x 1/2] + [1/2 x 1/2 x 1/2]

= 1/8 + 1/8

= 1/4

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Filed Under: Math Puzzles
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Q:

In what time a 360 m. long train moving at the speed of 44 km/hr will cross a 140 m. long bridge ?

A) 36 sec	B) 39 sec
C) 41 sec	D) 43 sec

Answer & Explanation Answer: C) 41 sec

Explanation:

Speed = 44 kmph x 5/18 = 110/9 m/s

We know that, Time = distance/speed

Time = (360 + 140) / (110/9)

= 500 x 9/110 = 41 sec.

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Filed Under: Time and Distance
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Q:

One card is drawn from a pack of 52 cards, each of the 52 cards being equally likely to be drawn find the probability the card drawn is red.

A) 2/3	B) 1/2
C) 1/52	D) 13/51

Answer & Explanation Answer: B) 1/2

Explanation:

We know that:

When one card is drawn from a pack of 52 cards

The numbers of possible outcomes n(s) = 52

We know that there are 26 red cards in the pack of 52 cards
⇒ The numbers of favorable outcomes n(E) = 26

Probability of occurrence of an event: P(E)=Number of favorable outcomes/Numeber of possible outcomes=n(E)/n(S)

∴ required probability = 26/52 = 1/2.

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Filed Under: Probability
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Q:

Which of the following is a true statement about Intranet and Internet ?

A) Encryption is necessary	B) They use similar protocol
C) Speed is slow	D) They use the same protocol

Answer & Explanation Answer: D) They use the same protocol

Explanation:

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Filed Under: Computer
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