Recent questions and answers in Numerical Ability

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1

countability
set of all binary sequences are uncountable it is true, then why set of all string over {0,1} is countable is'nt it also set of all binary sequence ??

asked 34 minutes ago in Numerical Ability by Lone Wolf Junior (875 points) | 3 views

+1 vote

1 answer

2

Gateforum
If xy = 9, yz = 16 and xz = 25, then what is the value of (x + y + z)? A) 12.0 B)12.4 C)12.8 D)13.0

answered 2 days ago in Numerical Ability by rohan.1737 (81 points) | 259 views

0 votes

1 answer

3

Probability
A 5-card poker hand is said to be a full house if it consists of 3 cards of the same denomination and 2 other cards of the same denomination (of course, different from the first denomination). Thus, one kind of full house is three of a kind plus a pair. What is the probability that one is dealt a full house?

answered 3 days ago in Numerical Ability by piya (191 points) | 9 views

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1 answer

4

probability
A deck of 52 playing cards is shuffled, and the cards are turned up one at a time until the first ace appears. Is the next card—that is, the card following the first ace—more likely to be the ace of spades or the two of clubs?

answered Aug 13 in Numerical Ability by Mk Utkarsh Boss (14.1k points) | 29 views

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1 answer

5

Clock Aptitude Question
A wall clock and a Table clock are set to correct time today on 10 pm. Wall clock looses 3 minute in 1st hour, 6 minutes in the second hour and 9 minutes in the third hour and so on. Table clock looses 5 minutes in the 1st hour, 10 minutes in the second hour and 15 minutes in the third hour and so on. When will they show the same time?

answered Aug 11 in Numerical Ability by arvin Active (3.6k points) | 50 views

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1 answer

6

Infinite series
Find the infinite sum of the series $1 + \frac{4}{7} + \frac{9}{7^2} + \frac{16}{7^3} + \frac{25}{7^4} + .............\Join$

answered Aug 9 in Numerical Ability by arvin Active (3.6k points) | 63 views

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1 answer

7

Aptitude question on Calendar
Which of the following day(s) can't be the 1st day of a century? Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday. Justify your answer.

answered Aug 8 in Numerical Ability by Priyanka Agarwal Active (1.5k points) | 30 views

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2 answers

8

Ratio
If 15% of x is the same as 20% of y, then x:y is?

answered Aug 7 in Numerical Ability by MITUL013 (63 points) | 14 views

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2 answers

9

algebra
The average of 50 numbers is 30. If two numbers, 35 and 40 are discarded, then the average of the remaining number is nearly?

answered Aug 6 in Numerical Ability by MITUL013 (63 points) | 28 views

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0 answers

10

Made Easy Aptitude
How much time does a clock lose in a day, if its hands coincide every 64 minutes?

asked Aug 6 in Numerical Ability by Sambhrant Maurya Junior (609 points) | 16 views

+1 vote

2 answers

11

Algebra
Beena's eyes are 1.5m above ground. She is looking at the top of a tree at the angle of 30°. The tree is 60m away on the same level ground. What is the height of the tree?

answered Aug 5 in Numerical Ability by saitejapenti (15 points) | 83 views

0 votes

1 answer

12

Work and time
A can do piece of work in 30 days while Bonku alone can do it in 40 days. If they work together, how long will it take to complete the work?

answered Aug 5 in Numerical Ability by Rishav Kumar Singh Active (2.8k points) | 14 views

+1 vote

2 answers

13

Problem solving
Two students appeared at an explanation. One of them secured 9 marks more than the other and his marks was 56% of the sum of their marks. The marks obtained by them are?

answered Aug 3 in Numerical Ability by pankaj_vir Loyal (9.2k points) | 36 views

0 votes

2 answers

14

Average
Smiths's marks were wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by half(1/2). The number of students in the class is?

answered Aug 3 in Numerical Ability by pankaj_vir Loyal (9.2k points) | 27 views

0 votes

1 answer

15

RS Aggrawal
Sam leaves home between 7 am and 8 am and returns between 1 pm and 2 pm to find that the minute and hour hands have interchanged their positions. How long was Sam out of the house? Plz include the explanation for ur answer.

answered Aug 3 in Numerical Ability by ShakyJ (11 points) | 28 views

+1 vote

4 answers

16

Average Problems
Average age of class of 39 student is 15 years. If the age of teacher is included the average is increased by 3 months. Find the age of the teacher?

answered Aug 2 in Numerical Ability by nitin bahekar (23 points) | 18 views

+2 votes

3 answers

17

Average
The average of five consecutive number is X. If the next three numbers are also included, determine the increase in the average of eight numbers. A) X B) X/2 C) X + 1.5 D) 2

answered Aug 1 in Numerical Ability by imnitish Junior (661 points) | 43 views

0 votes

2 answers

18

Average
The average weight of 10 men is increased by 1.8 kg when one man who weighs 53 kg is replaced by a new man. Find th weight of a new man?

answered Aug 1 in Numerical Ability by Sayan Bose Active (2.8k points) | 22 views

0 votes

1 answer

19

Made Easy aptitude
A garrison of 3300 men had provisions for 32 days when given at the rate of 850 gms per head. At the end of 7 days, a reinforcement arrives and it was found that the provisions will last 17 days more, when given at the rate of 825 gms per head. What is the strength of the reinforcement?

answered Jul 31 in Numerical Ability by Aneri shah (11 points) | 22 views

0 votes

1 answer

20

Algebra
A farmer divided his herd of cows among his four sons. He gave one son half of the herd; second son one-fourth of the herd; third son one-fifth of the herd; and the fourth song 48 cows. How many cows were there in the hers originally?

answered Jul 31 in Numerical Ability by goxul Active (1.1k points) | 33 views

0 votes

2 answers

21

Missing series
What number will complete the series 48, 12, 16, 4, 8, ___?

answered Jul 31 in Numerical Ability by SHAIKH SIDDIQ (11 points) | 50 views

0 votes

0 answers

22

Made Easy aptitude
A does half as much work as B in three-fourths of the time. If together they take 18 days to complete a work, how much time shall A take to do it?

asked Jul 31 in Numerical Ability by Sambhrant Maurya Junior (609 points) | 35 views

0 votes

0 answers

23

Charges for parking
Car parking along St. John street is charged at flat X dollar for any amount of time up to these hours, and 1/5 of X dollar each hour or fraction of an hour after the first three hours. How much does it cost to park for 5 hours and 30 minutes?

asked Jul 31 in Numerical Ability by Sangay (139 points) | 16 views

0 votes

1 answer

24

Number series
Find the next number in the series 4 8 12 20 ___

answered Jul 31 in Numerical Ability by goxul Active (1.1k points) | 27 views

+4 votes

3 answers

25

TIFR2013-A-10
Three men and three rakhsasas arrive together at a ferry crossing to find a boat with an oar, but no boatman. The boat can carry one or at the most two persons, for example, one man and one rakhsasas, and each man or rakhsasas can row. But if at any ... to the other side without any mishap, what is the minimum number of times that the boat must cross the river? $7$ $9$ $11$ $13$ $15$

answered Jul 30 in Numerical Ability by sutanay3 Active (2.2k points) | 236 views

0 votes

2 answers

26

Made Easy Aptitude
Let T be a set of integers {3,11,19,27,....451,459,467} and S be a subset of T such that the sum of no two elements of S is 470. The maximum number of elements in S is? a)32 b)28 c)29 d)30

answered Jul 29 in Numerical Ability by Rishabh Agrawal (341 points) | 58 views

0 votes

1 answer

27

Made Easy Aptitude
Set A is formed by selecting some of the numbers from the first 100 natural numbers such that the HCF of any two numbers in the set is 5. What is the maximum number of elements that A can have? a)7 b)8 c)9 d)10

answered Jul 28 in Numerical Ability by arvin Active (3.6k points) | 27 views

0 votes

1 answer

28

Made Easy aptitude
A=486 - 2171. How many digits would be there if A is expressed in binary base? a)171 b)86 c)87 d)172 Kindly give the explanation along with the answer.

answered Jul 28 in Numerical Ability by arvin Active (3.6k points) | 24 views

0 votes

1 answer

29

Age problems
I am sixteen years old, four times your age. When I am twice as your age, what will my age be?

answered Jul 26 in Numerical Ability by gauravkc Loyal (6.1k points) | 82 views

+8 votes

3 answers

30

GATE2017-1-GA-3
Rahul, Murali, Srinivas and Arul are seated around a square table. Rahul is sitting to the left of Murali. Srinivas is sitting to the right of Arul. Which of the following pairs are seated opposite each other? Rahul and Murali Srinivas and Arul Srinvas and Murali Srinivas and Rahul

answered Jul 26 in Numerical Ability by sutanay3 Active (2.2k points) | 1.6k views

+1 vote

1 answer

31

Probability
We are given a set $X = \left \{x_1, x_2, \ldots , x_n \right \}$ where $x_i = 2i$. A sample $S$ (which is a subset of $X$) is drawn by selecting each $x_i$ independently with probability $P_i = \frac 12$. The expected value of the smallest number in sample $S$ is: a) $1/n$ b) $2$ c) $\sqrt n$ d) $n$

answered Jul 23 in Numerical Ability by Aashish S Active (2.3k points) | 103 views

0 votes

1 answer

32

Aptitude
Number of two digit numbers divided by products of its digit are________

answered Jul 23 in Numerical Ability by imnitish Junior (661 points) | 83 views

0 votes

0 answers

33

Sum of series

asked Jul 22 in Numerical Ability by Pawan Kumar 2 Active (4.5k points) | 34 views

+3 votes

5 answers

34

GATE2011-IN-56
There are two candidates $P$ and $Q$ in an election. During the campaign, $40\%$ of the voters promised to vote for $P,$ and rest for $Q.$ However, on the day of election $15\%$ of the voters went back on their promise to vote for $P$ and instead voted ... $Q$ and instead voted for $P.$ Suppose, $P$ lost by $2$ votes, then what was the total number of voters? $100$ $110$ $90$ $95$

answered Jul 22 in Numerical Ability by sutanay3 Active (2.2k points) | 1.5k views

0 votes

1 answer

35

Quantitative Aptitude

answered Jul 22 in Numerical Ability by Prateek Raghuvanshi Loyal (5.3k points) | 95 views

0 votes

1 answer

36

Self-Doubt
Q. Two consecutive numbers are removed from the progression 1, 2, 3, ...n. The arithmetic mean of the remaining numbers is 26 1/4. The value of n is a. 60 b. 81 c. 50 d. Cannot be determined

answered Jul 20 in Numerical Ability by imnitish Junior (661 points) | 95 views

0 votes

1 answer

37

self doubt
The number of integer n between 100 < n <300 such that 16 divides (n^2-n-2) and 25 divides (n^2+2*n-3).

answered Jul 20 in Numerical Ability by Kunal7 (21 points) | 307 views

+1 vote

2 answers

38

Permutation and Combination
How many $10$ - digit strings of $0's$ and $1's$ are there that do not contain any consecutive $0's$?

answered Jul 19 in Numerical Ability by Arjun Veteran (355k points) | 124 views

+1 vote

1 answer

39

Aptitude
plz explain

answered Jul 19 in Numerical Ability by Naveen Kumar 3 Active (1.4k points) | 231 views

+1 vote

1 answer

40

Aptitude
Plz explain in details

answered Jul 18 in Numerical Ability by Shubham Shukla 6 Active (3.7k points) | 44 views

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