List of top Quantitative Aptitude Questions

Which interchange in sign and number would make the equation correct? \[ (96 + 128) + 64 = 2 \]
When a coin is tossed 4 times, what is the probability of getting at most 3 heads?
If the mean and standard deviation of the number of correctly answered questions in a test given to 4096 students are 2.5 and \(\sqrt{1.875}\) respectively, what is the estimate of the number of candidates answering 5 questions correctly?
In a consignment of electric lamps, 5% are defective. If a random sample of 8 lamps are inspected, what is the probability that one or more lamps are defective?
A sprinter goes off the starting block for a 100-meter run and at that instant the second-hand of a stopwatch had pointed towards north. He touches the finishing line exactly after 12 seconds. In which direction did the second hand point when he just crossed the finishing line?
A family has husband, wife, and three children A, B, and C. The present age of the husband is 5 years more than the wife's present age. Wife’s present age is twice the present age of A. The present age of A is 12 years more than the present age of B. B's present age is 2 times the present age of C. If C is 12 years old at present, what is the present age of the husband's friend Ram who is 15 years younger than the husband?
Reena, Rita and Zoha are three friends. Reena is the eldest followed by Rita and Zoha. Reena is 2 years older than Rita and 5 years older than Zoha. The sum of the present age of Reena and Zoha is 3 times the age of Rita 5 years ago. What is the current age of Rita?
A mother was asked how many gifts she had in the bag. She replied that there were dolls but six, cars but six, and all books but six. How many gifts had she in all?
In a school, 120 boys have registered for a singles carrom tournament. Each match eliminates one player. How many matches are to be organized to determine the champion?
A person needs to find the fastest two horses from 16 horses. Only a race of 4 horses can be conducted at a time. What is the minimum number of races to be conducted to determine the fastest two? (Assume that horses will not get tired at all and time cannot be measured)
In this multiplication question, the five letters represent five different digits. What are the actual figures? There is no zero. \[ S E A M \times T = M E A T S \]
Two candles are of different lengths and thickness. The short and long ones can burn respectively for 3.5 hours and 5 hours. After burning for 2 hours, the lengths of candles are equal. What fraction of the long candle's height was the short candle initially?
Find the next number in the series: 2, 6, 12, 20, .......
A train travels 60 km in 1 hour and 30 minutes. What is its average speed?
Solve for \( x \): \( 3x + 5 = 20 \)
A shopkeeper sells an article at a 20 percent profit. If the cost price is Rs 500, what is the selling price?
If the sum of the interior angles of a polygon is \(1260^\circ\), how many sides does it have?

How many possible words can be created from the letters R, A, N, D (with repetition)?

In a communication system, the bandwidth of a signal is:
The primary function of a Wheatstone bridge is to measure:
In a transistor, the current gain is defined as:
Which of the following is the main component of natural gas?
The modulus of elasticity of concrete is approximately:
In a series RLC circuit, if the frequency of the applied voltage is increased, the impedance of the circuit:
The efficiency of a Carnot engine depends on: