Question
Which substance is used to dissolve noble
metals?Solution
Aqua regia, a mixture of nitric acid and hydrochloric acid, is used to dissolve noble metals like gold and platinum.
The ratio of the present ages of P and Q is 8:7 respectively. If the age of P 10 years hence from now will be 100% more than the age of Q 4 years ago fr...
'P' and 'Q' have present ages in the ratio of 4:5. If Q’s current age is increased by 20%, the gap between their ages becomes 1...
The combined current ages of A, B, and C amount to 75 years. Five years from now, A's age compared to C's will be in the ratio of 5:7. Currently, B is 2...
- Present age of ‘R’ is 30% more than that of ‘S’. 4 years ago, ‘R’ was 1.6 times as old as ‘S’. Find the present age of ‘S’.
The present ages of A and B are 'x' years and 'y' years respectively. Four years ago, the sum of their ages was 34 years. If the average of 'x' and 31 i...
Current age of ‘A’ is 20% more than that of ‘B’. 5 years ago, the ratio of the ages of ‘A’ and ‘C’ was 5:6. If the total of current ages...
The current ages of 'Pankaj' and 'Ranjan' are in the ratio of 2:5. If Ranjan's age 13 years from now will be six times Pankaj's age 6 years prior to now...
Seema’s present age is 1(1/2) times of her marriage. She married 12 years ago. Now she has a daughter whose age is 2 more than one third of her ag...
Present ages of 'A' and 'B' are in the ratio 3:5, respectively. If B's age, 8 years hence from now will be 3 times of A's age, 2 years ago from now, the...
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...
Relevant for Exams:
