Quantitative Aptitude - Arithmetic Ability Questions

Dodecahedron has 20 vertices. How many edges does it have?

Ankit runs 324 metres every day for his fitness. According to his daily routine in how many days he covers 8.1 km.

A can make a cupboard in 10 days and B can do it in 50 days. Along with C, they did the job in 6.25 days only. Then in how many days C alone can do the job?

A sum of money becomes 77/50 of itself in 18/5 years when invested at simple interest. What is the rate (in percentage) of interest per annum?

In the following question, select the odd word pair from the given alternatives

If [2(4x/5 - 3/4)]/3 - 5/3 = -1/6, then the value of x is?

If (x – 2)2 + (y + 3)2 + (z – 15)2 = 0, then what is the value of x + y + z – 5?

What is the value of tan 300°?