Recent questions and answers in Numerical Ability - GATE CSE Doubts

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Quantitative Aptitude-Arun Sharma ( Time and Work)

asked 1 day ago in Numerical Ability by theprofessor (13 points) | 4 views

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Quantitative Aptitude-Arun Sharma (Time & Work)
There are three taps A,B,C in a tank. They can fill the tank in 10,20,25 hours respectively. At first all of them are opened simultaneously. Then after 2 hours, tap C is closed and A and B are kept running. After 4th hour tap B is also closed. ... tap A alone. Find the percentage of work done by tap A by itself. A) 32% B) 52% C) 75% D) none of these

answered 2 days ago in Numerical Ability by Kushagra गुप्ता (261 points) | 3 views

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#general aptitude
The probabilities that a student passes in Mathematics,physics and chemistry are m,p,and c respectively.Of these 3 subjects ,the student has a 75% chance in passing in at least onc,50% chance in passing at least two and a 40% chance of passing exactly two. calculate p+m+C=?

asked 4 days ago in Numerical Ability by DEBANJAN GHOSH (6 points) | 9 views

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Quantitative Aptitude-Arun sharma
Rs. 1694 is repaid after 2 years at compound interest. Which of the following is the value of the principal and rate? A) 1200, 20% B) 1300, 15% C) 1400,10% D) 1500,12%

answered 5 days ago in Numerical Ability by Ram Swaroop (270 points) | 7 views

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Quantitative Aptitude-Arun sharma
What is the simple interest for 9 years on a sum of Rs. 800 if the rate of interest for the first 4 years is 8% per annum and for the last 4 years is 6% per annum? A) 400 B) 392 C) 352 D) 382

asked 5 days ago in Numerical Ability by theprofessor (13 points) | 2 views

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Quantitative Aptitude-R.S Aggrawal
10,000 is to be paid back by 4 equal annual installments. Rate 10% per annum. Find the value of each installments.?

asked 5 days ago in Numerical Ability by theprofessor (13 points) | 6 views

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Gate 2020 general aptitude questions
If P=3, R=27, T=243, then Q+S= ________ 40 80 90 110 [closed]

asked Mar 23 in Numerical Ability by Kunal vaidhya (6 points) | 27 views

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Tomato Number Theory
I’m getting C as the answer, Can someone please verify? I don’t have the answer key.

answered Mar 14 in Numerical Ability by souren (28 points) | 16 views

+1 vote

1 answer

Virtual Gate-Apti
Isnot here D) should be ans??Here legth of AC=6, then how do we do 3:1 division?

answered Feb 4 in Numerical Ability by shashin (1.9k points) | 31 views

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GateAcademy YouTube: Find the Remainder
The value of $\left(2^{20} + 3^{30} + 4^{40} + 5^{50} + 6^{60}\right) \mod 7$ is ________.

asked Jan 28 in Numerical Ability by Lakshman Patel RJIT (115 points) | 77 views

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Gatebook Test Series 2020
How many four-digit numbers, with distinct digits, are there such that the sum of the digits of each of these numbers is an even natural number

asked Jan 25 in Numerical Ability by aditya dhanraj (7 points) | 6 views

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other source
There is a group of 100 Bibliophiles who gather together every weekend to discuss their learnings from the books they have read. They discuss in a group of two people. In order to start a discussion between two people, each individual should have read at ... (across all people) that are needed to achieve the condition for any two random members of the group to start a discussion?

asked Jan 22 in Numerical Ability by Naveen Nallanti (6 points) | 12 views

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GateAcademy Youtube: Unit Digit
Find the unit digit of $2011^{2013!} + 2013^{2015!} + 2015^{2017!}+ 2017^{2019!} + 2019^{2021!}\:?$

asked Jan 20 in Numerical Ability by Lakshman Patel RJIT (115 points) | 13 views

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GATEBOOK MOCK TEST 1 Q59
In an NGO study on the effect of sleep on call center workers, following were the observations made on a certain number of volunteers in the study. 75% of the volunteers receive fewer than 6 hours of sleep and report feeling tired during ... volunteers receive fewer than 6 hours of sleep, what percent of the volunteers report no feelings of tiredness during their shifts ?

asked Jan 16 in Numerical Ability by Rajat Maheshwari (14 points) | 10 views

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GO APTITUDE SELF DOUBT
When a number is divided by 13 ,the remainder is 11.when the same number is divided by 17,the remainder is 9.what is the number? How to solve this without trial and error?

answered Jan 14 in Numerical Ability by shashin (1.9k points) | 24 views

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Self Doubt Aptitude
In how many ways word “RAINBOW” can be arranged in which no vowels should come together?

answered Jan 13 in Numerical Ability by shashin (1.9k points) | 25 views

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ESE Civil - 2020 set A
A clock strikes once at $1$ o’clock, twice at $2$ o’clock thrice at $3$ o’clock and so on. The number of times it strikes in $24$ hours will be $116$ $136$ $156$ $196$

answered Jan 6 in Numerical Ability by tp21 (269 points) | 11 views

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ESE Civil - 2020
A man walked $3\: km$ towards East, then $5\: km$ towards North-East, then $8\: km$ towards South and finally $5\: km$ towards North-East direction. The distance of his present location from the starting point will be $9\: km$ $11\: km$ $15\: km$ $21\: km$

asked Jan 6 in Numerical Ability by Lakshman Patel RJIT (115 points) | 37 views

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GATE mock 2020 by IIT Dehli - Q.7
OPTIONS: [closed]

asked Jan 4 in Numerical Ability by gateoverflow_2020 (6 points) | 26 views

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SNAP-2018: Numerical Ability
A fast train leaves Chennai to Bengaluru and at the same point in time a slow train leaves from Bengaluru to Chennai. The fast train moves at a speed of $60\: km /hr$ and the slow train moves at half of the speed of the fast ... is further from Chennai The slow train is further from Chennai Both the trains are equidistant from Chennai None of the options is correct

asked Dec 23, 2019 in Numerical Ability by Lakshman Patel RJIT (115 points) | 12 views

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#ace test series questions

asked Dec 13, 2019 in Numerical Ability by amit166 (139 points) | 6 views

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2 answers

Math book jee
Find value infinite series $1+4/7+9/7^{2}+16/7^{3}+25/7^{4}+.........$

answered Nov 7, 2019 in Numerical Ability by pranay562 (926 points) | 36 views

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Aptitude:ACE Test
The minimum number of cables required to connect $8$ computers to $4$ printers to ensure that any $4$ computers can directly access $4$ different printers is __________ Ans given $20,$ I havenot got, how it could be?

asked Nov 2, 2019 in Numerical Ability by srestha (683 points) | 13 views

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Aptitude:ACE Academy Test
8 litres are drawn from a cask full of wine and is then filled with water. This operation is performed three more times. The ratio of the quantity of wine now left in cask to that of water is 16 : 65. How much wine did the cask hold originally? Is it solved with direct formula or other methods are there to solve it?

answered Nov 2, 2019 in Numerical Ability by pranay562 (926 points) | 18 views

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Virtual GATE test series: Aptitude
$8,2,14,6,11,?,14,6,18,12$ What will be in place of ‘?’ in the series ?

answered Oct 21, 2019 in Numerical Ability by chandrikabhuyan8 (120 points) | 48 views

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self doubt: to find HCF
$\gcd(36,k)=6$, then what is the k? I know the only naive method,can anyone explain any other method.

answered Oct 8, 2019 in Numerical Ability by !KARAN (351 points) | 40 views

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Aptitude Permutation and Combination
A 7 digit number is to make in such a way that the number formed is even. Repetition is not allowed I am attaching my approach, I want to clarify whether my approach is right or wrong My approach:-

answered Sep 30, 2019 in Numerical Ability by PriteshSingh (39 points) | 42 views

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MADE EASY APTITUDE TEST
What will come in the place of question (?) mark in the following number series. 726,799,878,961,1050,? 1149 1147 1145 1143

answered Sep 14, 2019 in Numerical Ability by Vimal Patel (916 points) | 38 views

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if A and B are mutually exclusive event with P(A)=0.3 P(B)= 0.5 then $P(A \cap B) =$

answered Sep 3, 2019 in Numerical Ability by GAITONDE (1.7k points) | 114 views

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#permuatationandcombination
Q.How many bit strings of length eight contain either three consecutive 0s or four consecutive 1s? 148 198 147 197

answered Sep 1, 2019 in Numerical Ability by Bikram (1.2k points) | 22 views

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#permutationandcombination
Q.How many bit strings of length 10 contain either five consecutive 0s or five consecutive 1s? 222 198 256 128

answered Sep 1, 2019 in Numerical Ability by Bikram (1.2k points) | 19 views

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Made Easy Test Series:Aptitude
Consider a set of numbers $\left \{ 1,7,7^{2},7^{3},.......,7^{100} \right \}$.The ratio of last number and ratio of last number and sum of remaining number closest to _______________ will ans be $60$ or $6$?? Plz someone verify.

answered Aug 17, 2019 in Numerical Ability by Satbir (4.1k points) | 26 views

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Self Doubt: Apti Made Easy
A rectangle of height 100 squares and width 200 squares is drawn on a graph paper. It is colored square by square from top left the corner and moving across in a spiral turning right whenever a side of the rectangle or a colored square is reached. Which square is colored last ... - the bottom right square is on row 100 and column 200) a) 50,50 b) 51,50 c) 51,150 d) 50,150

answered Aug 8, 2019 in Numerical Ability by Debdeep1998 (104 points) | 70 views

–1 vote

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Quant Apti Arun sharma
Each person’s performance compared with all other persons is to be done to rank them subjectively. How many comparisons are needed to total, if there are 11 persons? (does this ques suggests sorting of 11 no.s? that intuitively takes mind to count comparisons while sorting)

answered Aug 5, 2019 in Numerical Ability by Satbir (4.1k points) | 21 views

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Made easy workbook clocks
A clock is set right at 7 AM,and the clock loses 15 min in 24 hrs.what is the correct time when it shows 4PM.after 2 days?

asked Jul 27, 2019 in Numerical Ability by Rajeevkr (11 points) | 11.8k views

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Aptitude simple intrest
The present worth of Rs. 1404 due in two equal half-yearly installments at 8% per annum simple interest is: [A]. Rs. 1325 [B]. Rs. 1300 [C]. Rs. 1350 [D]. Rs. 1500

asked Jul 26, 2019 in Numerical Ability by shiva0 (19 points) | 12 views

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1 answer

aptitude percentages
Rahul went to a shop and bought things worth Rs. 25, out of which 30 Paise went on sales tax on taxable purchases. If the tax rate was 6%, then what was the cost of the tax free items? A. Rs. 15 B. Rs. 12.10 C. Rs. 19.70 D. Rs. 16.80

answered Jul 24, 2019 in Numerical Ability by Rudr Pawan (734 points) | 24 views

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aptitude on trains
Chennai express starts at 8 am from A towards B and Mumbai express starts at 8 am from B towards A. After their meet, Chennai express takes 18 hours to reach B and Mumbai express takes 8 hours to reach A. Then which of the following is their speed's ratio? A. 1:02 B. 2:03 C. 1:03 D. None of these can anyone answer with explanation???

answered Jul 20, 2019 in Numerical Ability by Debargha Bhattacharj (1.5k points) | 14 views

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#apti previous tcs apti
Hare in the other. The hare starts after the tortoise has covered 1/5 of its distance and that too leisurely3. A hare and a tortoise have a race along a circle of 100 yards diameter. The tortoise goes in one direction and the. The hare and tortoise meet when the hare has ... . By what factor should the hare increase its speed so as to tie the race? A. 37.8 B. 8 C. 40 D. 5

asked Jul 17, 2019 in Numerical Ability by shiva0 (19 points) | 19 views

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what is the question says about and answer,tcs previous question

asked Jul 17, 2019 in Numerical Ability by shiva0 (19 points) | 18 views

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