Free Practice Questions for Competitive Exams, Interviews, Certifications

Q:

The two lines 3x - 8y = 16 and 2x + 4y = 6 intersect at (a,b). Find the value of $a^{2} - 4 b^{2}$

A) 5	B) 10
C) 15	D) 20

Answer & Explanation Answer: C) 15

Explanation:

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Filed Under: Area
Exam Prep: Bank Exams , AIEEE

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Q:

30% of 500 rupees is?

A) Rs. 180	B) Rs. 150
C) Rs. 120	D) Rs. 240

Answer & Explanation Answer: B) Rs. 150

Explanation:

Given 30% of 500

$= \frac{30}{100} x 500 = 30 x 5 = 150$

Hence, 30% of Rs. 500 = Rs. 150.

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Filed Under: Percentage
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Q:

Two persons start running simultaneously around a circular track of length 600 m from the same point at speeds of 25 kmph and 35 kmph. When will they meet for the first time any where on the track ?

A) 54 sec	B) 36 sec
C) 72 sec	D) 11 sec

Answer & Explanation Answer: B) 36 sec

Explanation:

Time taken to meet the first time = length of track/relative speed

Given the length of the track is 600 m

The relative speed = 25 + 35 = 60 kmph = 60 x 5/18 m

Therefore Time = $\frac{600}{(25 + 35) \frac{5}{18}}$ = 600/60 x (18/5) = 36 sec.

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Filed Under: Time and Distance
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Q:

A mixture contains 25% milk and rest water. What percent of this mixture must taken out and replaced with milk so that in mixture milk and water may become equal.

A) 31.8%	B) 31%
C) 33.33%	D) 29.85%

Answer & Explanation Answer: C) 33.33%

Explanation:

Now, take percentage of milk and applying mixture rule

25 100

50

50 25 = 2 : 1

Hence required answer = 1/3 or 33.33%

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Filed Under: Alligation or Mixture
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Q:

5 L from A are V?

Answer

5 L from A are V --- 5 Letters from Alphabets are Vowels.

Workspace

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Subject: Logic Puzzles Exam Prep: GRE , GATE , CAT , Bank Exams , AIEEE
Job Role: IT Trainer , Database Administration , Bank PO , Bank Clerk , Analyst

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Q:

A person is sitting in a moving train and is facing the engine. He tosses up a coin and the cion fals behind him. It can be concluded that the train is moving:

A) forward and loosing speed	B) forward and gaining speed
C) forward and uniform speed	D) backward with uniform speed

Answer & Explanation Answer: B) forward and gaining speed

Explanation:

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Filed Under: Physics

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Q:

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative

Assertion (A) : Red colour of blood is due to haemoglobin.

Reason (R) : Haemoglobin is a red pigment.

A) Both A and R are true and R is the correct explanation of A.	B) Both A and R are true but R is NOT the correct explanation of A.
C) A is true but R is false.	D) A is false but R is true.

Answer & Explanation Answer: A) Both A and R are true and R is the correct explanation of A.

Explanation:

Haemoglobin is the blood pigment that imparts red colour to the blood.

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Filed Under: Assertion and Reason

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Q:

How many parameters are present in mismatch method in non-sequence modifying
algorithm?

A) 1	B) 2
C) 3	D) 4

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