sorry for the late reply..
@giyan @nitya101289 @sanu8080 @somnath9867123 🍻🍻🍻🍻
hi, my cat exam date is 11 nov and i have only prepared numbers,p&c;,indices,surds,log,progressions...i am giving my mocks and attempting approx.5 questions correctly....can anyone guide me what topics should i cover so that i could achieve more than 75 percentile in QA section ? 
In how many ways can four identical cell phones be distributed among 10 boys so that no boy receives more than one cell phone?
- 4^10
- 10^4
- 2^10
- 210
- 2880
0 voters
What is the maximum number of trials required to open a lock with a 3 digit numerical password, in which the last digit is known and the sum of the first two is less than or equal to the last digit?(Assume the password may start with 0)
- 45
- 55
- 36
- 40
0 voters
A circular cone is inscribes in a square pyramid. The base radius of the cone is a And the height of the cone as well as pyramid is 3a.What is the ratio of curved surface area of cone to the lateral surface area of the pyramid?
- pie/2
- pie/4
- pie/3
- pie/(2rt3)
0 voters
answer this
The probability of a bomb hitting a bridge is 1/2 and two direct hits are needed to destroy it.The least number of bombs required so that the probability of the bridge being distroyed is greater than 0.9 is?
- 7 bombs
- 9 bombs
- 8 bombs
- 3 bombs
0 voters
In a test consisting of 15 questions, 3 marks are awarded for a correct answer, 1 mark is deducted
for an incorrect answer and no mark is awarded for an unattempted question. If a student attempts
at least one question in the paper, what is the number of distinct scores that he can get?
- 58
- None of these
- 59
- 57
0 voters
What is the remainder obtained when the sum of the squares of any thirty consecutive natural
numbers is divided by 12?
a) 0
b) 3
c) 11
d) cannot be determined
Plz share your approach.....
Appurv and Vikram play a game in which they roll a 6-faced die alternately starting with Appurv.
Each of them keeps on adding the numbers rolled by him and the first one to get to a sum of at least
3 wins the game. What is the probability of Vikram winning the game?
a) 2/9
b) 293/6^4
c) 299/6^4
d) None of these
For an examination, 100 candidates appeared comprising two papers; 80 candidates secured pass marks in paper A and 70 candidates in paper B. The number of candidates who failed to secure pass marks in both the papers lies between .
a.)0 and 20
b.)20 and 30
c.)30 and 50
d.)0 and 50
Need to know the approach via venn diagram.
A man of height 1.8 cm moves at the rate of 14 m/min away from a pole of height 6 m.Then by what rate does the shadow of the man increases.??
In the figure given below, a quadrant of a circle of radius 2 units is drawn. If it touches the line AB at point M, what is the area of the shaded region (in square units)?
The 10 students of Batch B feel they have a doubt on circular permutation. Mr.Mathew called them in the discussion room and asked them to sit down around a circular table which is surrounded by 13 chairs. Mr Mathew told that his adjacent seat should not remain empty. Then, find the number of ways in which the students can sit around the table if Mr.Mathew also sits on a chair.
A person invites a party of 10 friends at dinner and places them -
1) 5 at one round table and 5 at another round table
2) 4 at one round table and 6 at another round table
Find the ratio of number of circular permutations of case 1 to 2
The number of ways of distributing 50 identical things among 8 persons in such a way that three of them get 8 things each, 2 of them get 7 things each and remaining 3 get 4 things each, is equal to?
There are six gates. Suppose 20 delegates arrive. How many records could be there?
My solution - We can select first delegate in 20 ways and he has 6 gates to choose from. 2nd delegate can be selected in 19 ways and he has 6 gates to choose from. Similarly for rest of the delegates.
Final eqn - (20*6*19*6*18*6......1*6) = 6^20*20!
Where is my logic wrong? Answer given is 25!/5!
Some numbers can be expressed as the sum of three of their factors. E.g. 12 can be expressed as
the sum of 2, 4 and 6. How many other such numbers are there which are less than 100?
(a) 16 (b) 15 (c) 7 (d) 2
If the difference between the areas of two squares is 100 and their sides are integers then which of the following can be the value of the side of the bigger square?
(a) 20 (b) 24 (c) 26 (d) 52 (e) 51
@placiddisciple @rubikmath