A number gets reduced to one-third when 48 is subtracted from it. What will be two-third of that number?
24
72
96
None of these
The distance between two places is 12 km. A map scale is 1:25000. The distance between the two places on the map, (in cm) is
24
36
48
60
When half of a number is increased by 15, the result is 39. The sum of digits of the original number is
6
7
9
12
The hundreds digit of a three-digit number is 7 more than the units digit. The digits of the number are reversed and the resulting number is subtracted from the original three-digit number. The units digit of the final number so obtained is
0
1
2
3
Rani, who is y yr old at present, is x yr older than Hamid. 15 yr ago, Hamid's age was of the age of Rani. Which of the following is true?
3y-4x= 45
2y-x= 15
-15=
3x-4y= 45
A.
3y-4x= 45
The present age of Rani be y year ( Given )
Let present age of Hamid be H year
Then, y= H+x ( Rani is x year older )
H = y-x
Now, according to question
(H-15) = (y-15) x
4(H-15) = y-15
4(y-x-15)= y-15 [ From eqn (i) ]
4y-4x-60 = y-15
4y-4x-y = -15+60
3y-4x = 45