Twenty women can do a piece of work in 50 days. After how many days from the start of the work should 5 more women join them so that the work is done in 45 days?
a. 20
b. 25
c. 30
d. 18
e. None of these
€‹In the figure, EAF is a common tangent to the circles at the point A. Chords AC and BC of the smaller circles are produced to meet the larger circle at G and D respectively . Which of the following must be true?
1.
2.ang(abd)=ang(agd)
3.ang(bae)=ang(adb)
1 only
2 only
1 and 3 only
2 and 3 only
"20 men can do a piece of work in 30 days working 4 hours a day. 30 men worked for 20 days for 3 hours a day. Then all were dropped except one. How many more days does he takes for him to complete the remaining work, working 10 hours a day?"
Select one:
a. 20
b. 30
c. 40
d. 60
e. None of these
Question 23 of 30
Is |n|
(1) n^x – n
(2) x^–1 = –2
a
b
c
d
Choose a. If the question can be answered with statement 1 alone
Choose b. If the question can be answered with statement 2 alone
Choose c. If both statement 1 and statement 2 are needed to answer the question and
Choose d. If the question cannot be answered even with the help of both statements
In how many ways can you post 10 different letters in four letterboxes such that no letterbox remains empty?
How many natural numbers N less than 100 satisfy the condition that the sum of the natural numbers from 1 to N is divisible by 15?
There are 24 offices of Nielsen Pvt. Ltd. round the globe grouped into four zones with six offices per zone. The offices are to be connected with telephone lines such that every two offices are connected with three direct lines
if they belong to the same zone, and with only one direct line otherwise. How many direct telephone lines are required?
Rishabh is picking out balls randomly from a box containing 60 colored balls: 15 green,12 red, 11 blue, 10 yellow, 8 black and 4 white."What is the minimum number of balls Rishabh needs to pick to ensure that he has at least 9 balls of the same color?
14
44
45
48
ΔABC is right angled at B, ΔDEF is an equilateral triangle with points D, E and F on sides BC, AC and AB respectively such that D is the mid-point of side BC and ∠ACB = 60°. If the area of the ΔDEF is 7rt3cm2, then what is the length of side BC (in cm)?
In a 20-sided regular polygon , each side is 10cm. What is the difference between square of circum radius and square of inradius?
Find the number of ways of choosing 20 letters out of letters of the word "CAT" such they they cannot be used to spell the word 'CAT'.
N.B:- Since "CAT" has only 3 letters and you are told to select 20 letters that means repetition is a must
If K is the number of ways in which 3 numbers in AP can be selected from a set of numbers { 1, 2, 3, ...... n} then
(i) Find the value of 'K' when n =100
(ii) Find the value of 'K' when n =101
x n y are natural numbers such that x
- 49
- 30
- 20
- 23
0 voters
I have a doubt. Consider a triangle ABC. The perpendicular bisector of BC meets A. Lets say it meets BC at D. Now AD will be perpendicular to BC. Can we say that AB=AC?? If so how?
I have a doubt:
Only a single rail track exists between stations A and B on a railway line. One hour after the north- bound super fast train N leaves station A for station B, a south-bound passenger train S reaches station A from station B. The speed of the super fast train is twice that of a normal express train E, while the speed of a passenger train S is half that of E. On a particular day, N leaves for B from A, 20 min behind the normal schedule. In order to maintain the schedule, both N and S increased their speeds. If the super fast train doubles its speed, what should be the ratio (approximately) of the speeds of passenger train to that of the super fast train so that the passenger train S reaches exactly at the scheduled time at A on that day?
a1 : 3
b1 : 4
c1 : 5
d1 : 6
Four friends Mani,Sunny,Honey and Funny start from four towns Mindain,Sindain,Hindain and Findain respectively. the four towns are at the four corners of an imaginnary rectanglea.They meet at a point inside this imaginary rectangle. At that point three of them ( Mani.Sunny and Honey) had travelled distances of 40,50 and 60 m respectively.The maximum distance that Funny could have travelled about is :1.67m 2.53m 3.24m 4.Cannot be determined.
Let V be a set of real numbers such that if p is any real number in the set then there exist two numbers in V, whose average is p, then which of the following is true?
aV is a finite set.
bV is a set containing all real numbers.
cV is a set of all numbers in the interval (2, 3).
dV is a set of all number.
plz help ...........The equation x2 + px + q = 0 has exactly one root between x = 0 and x = 1. Find the value of q(1 + p + q)
0,1, a negative value
Along a road lie an odd number of stones placed at intervals of 10 m. These stones have to be assembled around the middle stone. A person can carry only one stone at a time. A man carried out the job starting with the stone in the middle, carrying stones in succession, thereby covering a distance of 4.8 km. Then the number of stones is
a) 35
b) 31
c) 33
d) 15
e) 29
Ramit and Amit travel with uniform speed from A to B and B to A respectively, via the same route. Ramit starts at 5:00am while Amit starts four hours later. They meet, on the way, at 1:10pm. At what time do they reach their destination, if both of them reach at the same time?
a)7pm
b)8pm
c)6:30pm
d)7:30pm