The ratio of present ages of Shankar and Mohan is 7: 8 respectively. Four year hence this ratio becomes 9: 10 respectively. What is Shankar’s present age in years?

The ratio of investment of Ram and Shyam is 11: 12 and the ratio of their profits is 2: 3. If Ram invested the money for 8 months, find for how much time Shyam invested his money?

If Cost Price of 20 tables is equal to the Selling Price of 25 tables. Find the loss percentage.

Mr. Rajesh invested Rs.25000 in two fixed deposits X and Y offering compound interest at 6% per annum and 8% per annum, respectively. If the total amount of interest accrued in two years through both fixed deposits is Rs.3518, then the amount invested in scheme X is -

If Arun purchases 11 articles for Rs.10 and sold all the articles at the rate of 10 for Rs.11, the profit percentage will be.

What are the units of electrical conductivity?

Ram sells two articles, each for the same price Rs.720. He incurs 20% loss on the first and 10% loss on the second. Find his overall percent loss.

What are the main colors in photography?