Question
A number is first increased by 80%, then increased by 50%
and then decreased by 50%. If the resultant number is 360, then find the original number.Solution
ATQ,
Let the original number be '100x'.
ATQ;
100x × 1.8 × 1.5 × 0.5 = 360
Or, 135x = 360
So, x = 2.67
So, original number = 2.67 × 100 = 267
A lad was asked his age by his friend. The lad said “The number you get when you subtract 25 times my age from twice the square of my age will be thri...
Three years ago, the ratio of ages of ‘Ravi’ and his sister was 3:4. Three years from now, the ratio of ages of Ravi and his mother will be 2:5. In ...
Shalini is younger than Rashi by 4 years. If the ratio of Shalini and Rashi ages is 3:4 respectively, then find the age of Shalini.
Determine the ratio of the present ages of Chintu to Danny if, 12 years ago, the ratio of Sunita's age to Binita's age was 9:5, and Sunita's age, 6 year...
Present age of ‘A’ is 40% more than that of ‘B’. If 10 years hence from now, ‘B’ will be 4 years younger than ‘A’, then find the sum of ...
A's age : B's age is 4 : 3. After 6 years, A will be 26 years. What is B's present age?
Five years after a couple's marriage, a daughter was born. The average age of the family 3 years after the daughter was born is 24 years. Further 3 year...
12 years ago, A was 1/2 of B’s age. If the ratio of their present ages is 4:5, what will be the sum of their present ages?
A certain sum of money becomes 4 times of itself in 15 years at simple interest. In how many years does it become double of itself at the same rate of s...
Riya is 5 years older than Meera, while Meera is 2 years younger than Nita. The ratio of age of Riya, 3 years hence and Meera, 1 year ago is 8:5. Find t...
Relevant for Exams:
