Subject: Math, asked on 20/6/14

## A manufacturer has 600 L of a 12% solution of acid. How many litres of a 30% acid solution must be added to it so that the acid content in the resulting mixture will be more than 15% but less than 18%?

Subject: Math, asked on 7/4/16

## Solve ➩ mod (x) - 1 ÷ mod (x) - 2 is greater than or equal to 0. {Please explain the whole sum in detail} Sir, these types of sums are not in our ncert booklet. But I found the same in RD sharma. So, tell me that whether it is right to concentrate in this type of sums or not.

Subject: Math, asked on 26/7/12

## a polygon has 44 diagonals.find the no. of its sides.

Subject: Math, asked on 26/1/17

## Solve 7x+1<=4x+5 and represent the solution graphically on the number line.

Subject: Math, asked on 29/3/14

## an object dropped from cliff falls with a constant acceleration of 10m/s2 find its speed after 2s after it was dropprd

Subject: Math, asked on 22/8/11

## Q. Solve graphically:- 3y-2x<4, x+3y>3, x+y<equals 5.

Subject: Math, asked on 8/3/14

## A furniture dealer deals in only two items : tables and chairs . He has Rs. 15000 to invest and a space to store atmost 60 pieces . A table costs him Rs. 750 and a chair Rs.150 . Formulate the data in the form of inequations and draw a graph representing the solution of these inequations.

Subject: Math, asked on 26/7/12

## in how many ways can the letters of the word FRACTION be arranged so that no two vowels are together.

Subject: Math, asked on 26/7/12

## if 22Pr+1:20pr+2 = 11:52 find r

Subject: Math, asked on 7/5/14

## 15x less than 73, where (i)x belongs to N and (ii) Z.solve the inequation and represent the solution set on the number line.

Subject: Math, asked on 29/3/14

## a scooter covers 20km/h at a uniform speed of 30km/h what should be its speed for the next 40 km if the average speed is 60km/h

Subject: Math, asked on 3/2/16

## 5x/4+3x/8> 39/8 ; 2x-1/12 - x-1/3

Subject: Math, asked on 27/9/12

## if log0.3(x-1) < log0.09(x-1), then x lies in the interval....

Subject: Math, asked on 21/10/16

## Draw the graph of y=-5 y=5 on the same graph .Are the lines parallel Find the point of integration of two lines Draw the graph of y=-5 y=5 on the same graph .Are the lines parallel Find the point of integration of two lines

Subject: Math, asked on 18/6/10

## Find all pairs of consecutive even positive integers, both of which are larger than 5 such that their sum is less than 23.

Subject: Math, asked on 7/4/16

## Solve for x :- ➩ mod(x - 2) is greater then or equal to 5. How to do the last step, please explain sir.

Subject: Math, asked on 26/7/12

## if n-1cr:ncr:n+1cr=6:9:13 find n and r

Subject: Math, asked on 6/10/16

## Solve : |x|-1/|x|-2 >= 0

Subject: Math, asked on 29/3/14

## an object moves along a straight line with an acceleration of 2m/s2 if its initial speed is 10m/s what will be its speed 5s later

Subject: Math, asked on 7/5/13

## how to solve:log2 [ x-5 /2x-3 }2 <0

Subject: Math, asked on 26/7/12

## if all permutations of the letters of the word INDIA are arranged as in a dictionary what is the 60th word?

Subject: Math, asked on 2/8/13

## how to solve modulus (2x - 1/x - 1)>2?

Subject: Math, asked on 19/8/15

## Find the conjugate and argument of 2+i / 4i+(1+i)2

Subject: Math, asked on 20/6/14

## A plumber can be paid under 2 schemes as given below:-I : \$600 and \$ 50 per hour.II: \$ 170 per hour .If the job takes n hours, what values of n does Scheme I give the plumber better wages?

Subject: Math, asked on 26/7/13

## While drilling a hole in the earth, it was found that the temperature (TC) at x km below the surface of the earth was given byT = 30 + 25(x - 3), when 3 ≤ x ≤ 15.Between which depths will the temperature be between 200C and 300C?

Subject: Math, asked on 8/9/14

## a milk of 80% conc. is diluted at home by the seller by adding some water to it so that milk conc. is reduced btw 65% to 70% . if 640 l of milk of 80% conc. is available how much water has been added??

Subject: Math, asked on 13/7/15

## Solve the following system of inequalities graphically 2x +y ≤ 24 , x +y ≤ 11 , 2x + 5y ≤ 40 , x ≥0 , y ≥ 0

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