Six men and two boys working together can complete a piece of work in 2 1/4 days. If the number of days taken by 5 boys to complete the same work is 4 more than that taken by 3 men, then the efficiency of a boy is what percent that of a man?
share any short method u noe other than the quadratic eqn. method.
there are six people a, b,c,d,e,f among whom a sum of rs 50 is to be distributed in such a way that the difference between the amount of a and b is equal to the difference between the amount of e and f. further, b has twice the amount that d has and c has thrice the amount that e has. it is also known that the amount each one has is an increasing order from f to a. what is the amount that f, b and a have individually?
How do you find sum of an A.P.,in which the difference is increasing by a constant number.
Such as in AP
1,3,6,10......up to 100 terms.
Kindly explain in full.Thank you
if A & B are two sets such that n(A)=5 & n(B)=3 , the number of functions possible from A to B, which are not surjections is ?
explain it in detail. 😠
what is the sum of coeff. of the power of x with even indices in the expansion of (1-x)^30??
puys approach please??
Four distinct coins are placed into one or more of five different boxes randomly. Find the probability that exactly 3 boxes will have at least one coin.
How do you do this?please help
has anybody solved AIMCAT1417..PLS RPLY
k is a natural number such that 1≤ k ≤ 78, for how many values of k is the tens digit of 31^k equal to 6
What is the remainder when N=1212121212.. till 300 digits is divided by 99?
O is the Centre of Circle and Triangle AOB is a right angled triangle. If area of Triangle AOB is 54, what is the area of the circle?
- 123
- 135
- None
- 147
0 voters
Arey how to handle under-root wale Inequalities ?
1. (x^2 -1)* _/ (x^2 - x -2) >= 0
2. _/ (x+7)
I dont want complete answer Only approach will be fine.
@sagarcat @rubikmath
1. (x^2 -1)* _/ (x^2 - x -2) >= 0
2. _/ (x+7)
I dont want complete answer Only approach will be fine.
@sagarcat @rubikmath
Mahesh marked an article at x% above his cost price. He sells it after offering a discount but still makes a profit. Which of the following cannot be the discount (in percentage) he offered?
- None of these
- x%
- 100/(100+x)%
- 200/(100+x)%
0 voters
in how many ways can 45^2 be written as sum or difference of two non-zero perfect squares?
- 8
- 11
- 9
- 10
0 voters
what is the number of terms in the expansion of (1+x +x^2+x^3+x^117)^5
approach please
In Navratra a society of three families (each family has three member a father, a mother & a daughter) wants to worship Goddess Durga. They decided that in a day one person of the society will do Puja. So they divided all nine days among them (9 people) such that within a family mother will do puja after father and daughter will do puja after father and mother. Then how many different way they can do Puja in Navratra.
(x-2a)(x-a)(x-5a)(x-11a) + ka^4 ... for what min value of k dis expression will become a perfect sq??
- 64
- 81
- 72
0 voters
a+b+c+d=30. How many possible number of solutions if all of them take odd values ? @placiddisciple approach plz
If N=3^a*3^b , a and b can take values range from 1 to 6. what is the probability that N is a multiple of 729?
- 13/18
- 5/18
- 5/11
- 13/11
- None of these
0 voters
Please solve..and also please mention if there is a generalized method in solving these types of questions ( case questions) ,
making cases with 2 independent variables is easy but henceforth its gets really tuff
1010101.....94 Digits ÷ 375 Rem?? 1) 10 2) 260 3)350 4)20