The double-helical structure of DNA was given by Watson and Crick.
Ratio of income of A and B is 7:5 and the ratio of expenditure of A and B is 2:3. The savings of B is Rs.3500. If the expenditure of A gets double then...
The ratio of two numbers is 3: 5. If eight is added to the first, and seven to the second, then the ratio becomes 2:3. What will be the ratio become if...
A solution contains alcohol and water in the ratio 3:2. If 15 liters of water is added to the solution, the ratio becomes 3:5. What was the initial volu...
A chemist combines three solutions with active ingredient concentrations of 10%, 20%, and 30% in the ratio 2:3:5. If the total volume of the mixture is ...
Vijay has 100 notes of Rs 50 and Rs 100. If his total money is Rs 6500, find the number of Rs 100 notes.
In a college the ratio of boys and girls are in the ratio 7:9. 65% girls and 40% boys were absent. Find the girls present if the total number of student...
If the ratio of the sum invested and simple interest received after 1 year is 25:9 respectively, then find the rate of interest.
Rs. 2016 was wrongly divided between ‘P’, ‘Q’, and ‘R’ in the ratio of 6:7:9, respectively, instead of (1/6):(1/7):(1/9). Amount received by...
Rs 2106 was divided among Anil, Bhanu and Charan in the ratio of 13:10:16 respectively. Find the amount received by Anil and Bhanu together.
Mohini's Biology test had 250 questions i.e., 20 Macromolecules, 60 Homeostasis and 70 Immunology questions. Although she answered 70% of the Macromolec...
