The total number of females are what percent of the total number of males in the organization?

$$(49)^{15}-1$$ is exactly divisible by :

A work is done by 30 workers not all of them have the same capacity to work. Every day exactly 2 workers, do the work with no pair of workers working together twice. Even after all possible pairs have worked once, all the workers together works for six more days to finish the work. Find the number of days in which all the workers together will finish the work?

For each 200 rupees spent by the research department, sales departments spend 20 rupees. For every 400 rupees spent by the sales department, the advertising department spends 150 rupees. The triple ratio of the money spent by the research department to the money spent by the sales department to the money spent by the advertising department can be expressed as: 

If the time in clock is 12 : 23. What is the time in the mirror? 

one fourth of a tank holds 135 litres of water. What part of the tank is full if it contains 180 litres of water ?

A car travelled 80% of the distance from town A to B by traveling at T hours at an average speed of V km/h. The car travels at an average speed of S km/h for the remaining part of the trip. Which of the following expressions represents the average speed for the entire trip?

The price of sugar is reduced by 25 % but in spite of the decrease, Aanysh ends up increasing his expenditure on sugar by 20% . What is the percentage change in his monthly consumption of sugar?