If $A=\begin{bmatrix} 1 &0 &0 \\ 0& 1 &1 \\ 0&-2 & 4 \end{bmatrix}$ and $6A^{–1} = A^{2} + cA + dI$, where $A^{–1}$ is A- inverse, I is the identify matrix, then (c, d)
is
Let $\vec{a}=\hat{j}-\hat{k}$ and $\vec{c}=\hat{i}-\hat{j}-\hat{k}$ . Then the vector $\vec{b}$ satisfying $(\vec{a} \times \vec{b})+ \vec{c} =0$ and $\vec{a} . \vec{b}=3$ is
Find the number of elements in the union of 4 sets A, B, C and D having 150, 180, 210 and 240
elements respectively, given that each pair of sets has 15 elements in common. Each triple of sets has
3 elements in common and $A \cap B \cap C \cap D = \phi$
Given: \(|A|=150,\ |B|=180,\ |C|=210,\ |D|=240\); every pair has 15 common elements; every triple has 3 common elements; and \(A\cap B\cap C\cap D=\varnothing\).
A six faced die is a biased one. It is thrice more likely to show an odd number than to show an even
number. It is thrown twice. The probability that the sum of the numbers in the two throws is even is
Let $\Delta ABC$ be a triangle whose area is $10\sqrt{3}$ units with side lengths $|AB|= 8$ units and $|AC|=5$
units. Find possible values of the angle A
Person A can hit a target 4 times in 5 attempts. Person B - 3 times in four attempts. Person C – 2
times in 3 attempts. They fire a volley. The probability that the target is hit at least two times. Is
If $\omega$ is a cube root of unity, then find the value of determinant $\begin{vmatrix} 1+\omega &\omega^{2} &-\omega \\ 1+\omega^{2}&\omega &-\omega^{2} \\ \omega^{2}+\omega&\omega &-\omega^{2} \end{vmatrix}$
If the vector $2\hat{i}-3\hat{j}$ , $\hat{i}+\hat{j}-\hat{k}$ and $3\hat{i}-\hat{k}$ form three conterminous edges of a parallelepiped, then thevolume of parallelepiped is
Let $T_n$ denote the number of triangles which can be formed by using the vertices of a regular polygon
of $n$ sides. If
$T_{n+1} - T_{n} = 21$
then $n$ equals
If $\overline{X_1}$ and $\overline{X_2}$ are the means of two distributions such that
$\overline{X_1} < \overline{X_2}$ and $\overline{X}$ is the mean of the combined
distribution, then
Atal Speaks truth in 70% and George speaks the truth in 60% cases. In what percentage of cases they
are likely to contradict each other in stating the same fact?
A man observes the angle of elevation of the top of mountain to be 30o. He walks 1000 feet nearer and
finds the angle of elevation to be $45^{o}$. What is the distance of the first point of observation from the
foot of the mountain?
The sum of $n$ terms of an arithmetic series is 216. The value of the first term is $n$ and the value of the
$n^{th}$ term is $2n$. The common difference, $d$ is.
Force $3\hat{i}+2\hat{j}+5\hat{k}$ and $2\hat{i}+\hat{j}-3\hat{k}$ are acting on a particle and displace it from the point $2\hat{i}-\hat{j}-3\hat{k}$ to $4\hat{i}-3\hat{j}+7\hat{k}$ the point then the work done by the force is
The equations of the line parallel to the line $2x – 3y = 7$ and passing through the middle point of the line segment joining the points (1, 3) and (1, –7) is.
If A and B are two events such that $P(A \cup B)=\frac{5}{6}$ , $P(A \cap B)=\frac{1}{3}$ and $P(\overline{B})=\frac{1}{2}$, then the events A and B are
Let $\vec{a}, \vec{b}, \vec{c}$ be the position vectors of three vertices A, B, C of a triangle respectively then the area of this triangle is given by
A train takes 18 seconds to pass completely through a station 162 m long and 15 seconds through
another station 120 m long, at the same speed. What is the length of the train, in meters?
In a row of children facing North, Shamika is third to the right of Nikhil, who is 17th from the right
end of the row. Ravi is 5th to the left of Shamika and is 20th from the left end. Totally how many
children are there in the row?
There are four brothers Alan, Bob, Carl and Dave. Dave is two years older than Bob. Bob is one year
younger than Carl. Alan, who is 34, is two years younger than Carl. Who is the oldest?
An employee has been assigned the task of allotting offices to six of the staff members. The offices are
numbered 1 - 6. The offices are arranged in a row and they are separated from each other by six foot high
dividers. Hence voices, sounds and cigarette smoke flow easily from one office to another.
Miss Robert needs to use the telephone quite often throughout the day. Mr. Mike and Mr. Brown need
adjacent offices as they need to consult each other often while working. Miss. Hardy, is a senior employee
and has to be allotted office number 5, having the biggest window. Mr. Donald requires silence in the
offices next to his and Mr. Tim prefers to be as away as possible from Miss Robert. Mr. Mike and Mr. Donald are all smokers. Miss Hardy finds tobacco smoke allergic and consecutively the offices next to hers
to be occupied by non-smokers. Unless specifically stated all the employees maintain an atmosphere of
silence during office hours.
The ideal candidate to occupy the office farthest from Mr. Brown would be
An employee has been assigned the task of allotting offices to six of the staff members. The offices are
numbered 1 - 6. The offices are arranged in a row and they are separated from each other by six foot high
dividers. Hence voices, sounds and cigarette smoke flow easily from one office to another.
Miss Robert needs to use the telephone quite often throughout the day. Mr. Mike and Mr. Brown need
adjacent offices as they need to consult each other often while working. Miss. Hardy, is a senior employee
and has to be allotted office number 5, having the biggest window. Mr. Donald requires silence in the
offices next to his and Mr. Tim prefers to be as away as possible from Miss Robert. Mr. Mike and Mr. Donald are all smokers. Miss Hardy finds tobacco smoke allergic and consecutively the offices next to hers
to be occupied by non-smokers. Unless specifically stated all the employees maintain an atmosphere of
silence during office hours.
1. The three employees who are smokers should be seated in the offices.
An employee has been assigned the task of allotting offices to six of the staff members. The offices are
numbered 1 - 6. The offices are arranged in a row and they are separated from each other by six foot high
dividers. Hence voices, sounds and cigarette smoke flow easily from one office to another.
Miss Robert needs to use the telephone quite often throughout the day. Mr. Mike and Mr. Brown need
adjacent offices as they need to consult each other often while working. Miss. Hardy, is a senior employee
and has to be allotted office number 5, having the biggest window. Mr. Donald requires silence in the
offices next to his and Mr. Tim prefers to be as away as possible from Miss Robert. Mr. Mike and Mr. Donald are all smokers. Miss Hardy finds tobacco smoke allergic and consecutively the offices next to hers
to be occupied by non-smokers. Unless specifically stated all the employees maintain an atmosphere of
silence during office hours.
A doctor said to his compounder "I go to see the patients at their residence after every 3 hours 30
minutes. I have already gone to the patient 1 hour 20 minutes ago and next time I shall go at 1:40
P.M." At what time this information was given to the compounder by the doctor?
Shyam is taller than Pradeep and Pradeep is as tall as Anurag. But Anand is shorter than Suresh,
who is as tall as Anurag. If Pradeep is taller than Praveen, who is the tallest of all?
When Rajeev was born his father was 32 years older than his brother and his mother was 25 years
older than his.sister. If Rajeev's brother is 6 years older than Rajeev and his mother is 3 years
younger than his father, how old was Rajeev's sister when he was born?
Dhoni starts from his office at 8 A.M. on a Sunday morning, travels 10 km towards West and then
turns to his left and walks 8 km. Then he again turns to his left and walks 4 km and then stops. What
is the shortest distance to his office from the point where he stopped?
Ana is a girl and has the same number of brothers as sisters. Andrew is a boy and has twice as many
sisters as brothers. Ana and Andrew are the children of Emma. How many children does Emma
have?
Karan and Arjun run a 100 metres race, where Karan beats Arjun by 10 metres. To do a favour to Arjun, Karan starts 10 metres behind the starting line in a second 100 metre race. They both run at their earlier speeds. Which of the following is true in connection with the second race?
In a cricket season, India defeated Australia twice. West Indies defeated India twice. Australia
defeated West Indies twice. India defeated New Zealand twice and West Indies defeated New Zealand
twice. Which country has lost most number of times?
There are five persons A, B, C, D, E standing on six steps numbered 1 , 2, 3 , 4, 5 and 6 from the bottom.
At most one person is standing on each step. The step number, on which A is standing, is two less than
that of C. Step number on which B is standing is one more than that of D
If A is standing on Step 1, which of the following is true?
There are five persons A, B, C, D, E standing on six steps numbered 1 , 2, 3 , 4, 5 and 6 from the bottom.
At most one person is standing on each step. The step number, on which A is standing, is two less than
that of C. Step number on which B is standing is one more than that of D
If D is standing on step 1, on which step A could be standing?
There are five persons A, B, C, D, E standing on six steps numbered 1 , 2, 3 , 4, 5 and 6 from the bottom.
At most one person is standing on each step. The step number, on which A is standing, is two less than
that of C. Step number on which B is standing is one more than that of D
If there are two steps in between the steps on which A and D are standing, A must be standing on
which of the following steps?
From the information given below: A * B means A and B are of the same age, A – B means B is
younger than A. A + B means A is younger than B. What does Sachin * Mohan – Ravi mean?
Jimmy saw the time while going to the tennis court. He saw the hour hand is 20° away from 4. After
he returned from tennis court, he noticed that the hour hand is 20° away from 4. If he took ten
minutes to go to tennis court and he walked at the same speed while going to the tennis court and
while returning, how much time did he spent at the tennis court?
There are 8 balls looking alike, seven of which have equal weight and one is slightly heavier. The
weighing balance is of unlimited capacity. Using this balance, the minimum number of weighings
required to identify the heavier ball is:
Out of the alternatives, choose the appropriate phrase to make the sentence meaningful. If you had
joint accounts with who died, then you will be responsible for the bills.
Explanation: The preposition by is used to indicate “not later than” a specific time.
Hence, “leave by 7.30 A.M.” means you should leave at or before 7.30 to avoid traffic.
Explanation: Since the reporting verb says is in the present tense,
the verb inside the reported speech remains in the same tense.
Therefore, “I like” becomes “she likes”.
Answer: She was one of the average students of the class
Explanation: The phrase “one of the” must be followed by a **plural noun**,
because it refers to one person from a group. Therefore, students (plural) is correct, not student (singular).
Explanation: The singular subject decoration takes the singular verb is.
As there is no comparison being made, the correct form is the superlative is most pleasing,
meaning “very pleasing.”
Explanation: The subject President is singular, and the phrase
“accompanied by his advisors” is parenthetical. Therefore, the correct verb is
was to agree with the singular subject in past tense.
A Multiplexer (MUX) is a universal combinational circuit that can implement any digital logic function, hence all digital circuits can be realized using only multiplexers.
A Flip-Flop circuit is a bistable device capable of storing one bit of data,
making it the basic building block of memory and storage elements in computers.
EEPROM stands for Electrically Erasable Programmable Read Only Memory, a type of non-volatile memory that can be erased and reprogrammed using electrical signals.