Quantitative Aptitude - Arithmetic Ability Questions

The ratio of sand to gravel in a mixture is 17:8 while that between gravel and cement is 6:17. What is the ratio of sand to cement in the mixture?

An engineering student has to secure 25% marks to pass. He gets 45 and fails by 45 marks. Find the maximum marks.

The mean of 10 observations is 17. One more observation is included and the new mean becomes 16. The 11th observation is

One-third of Poojitha's age three years ago plus one-half of her age two years from now is twenty years. How old is she now?

If 15 persons can do a job in 30 days, then 30 persons with twice the efficiency can do the same job in how many days?

The ratio of two numbers is 5 : 6. If their product is 1470, then what is the sum of both the numbers?

What is the value of tan 6° tan 36° tan 84° tan 54° tan 45°?

A bag contains coins of denominations Rs.1, Rs.5 and Rs.10. Assuming there are equal number of Rs.1, Rs.5 and Rs.10, what will be the total number of coins in the bag be if the total money is Rs. 368?