Quantitative Aptitude - Arithmetic Ability Questions

Ram is 20 years younger than Shyam. 5 years ago, the ratio of their age was 3:5. The sum of their present age is

A can do a work in 21 days and B in 42 days. If they work on it together for 7 days, then what fraction of work is left?

What is the LCM (least common multiple) of 57 and 93?

There are 90 coins, comprising of 5 and 10 paisa coins. The value of all the coins is Rs. 7. How many 5 paisa coins are there?

If tan 45° + cosec 30° = x, then find the value of x.

(61 + 62 + 63 + ......... +110) = ?

A fraction becomes 6/5 when 5 is added to its numerator and becomes 1/2 when 4 is added to its denominator. What will be the value of the fraction?

If ABCDEF is a regular hexagon, then what is the value (in degrees) of ∠ADB?