Quantitative Aptitude - Arithmetic Ability Questions

A mason can build a wall in 18 hours. After 9 hours he takes a break. What fraction of the wall is yet to be built?

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

In ΔABC, AD is the median and AD = (1/2)BC. If ∠ACD = 40°, then what is the value (in degrees) of ∠DAB?

ΔPQR is right angled at Q. If cotP = 5/12, then what is the value of tanR ?

The distance between the points (4, 8) and (k,-4) is 13. What is the value of k?

Select the odd number from the given alternatives.

If x – y – √18 = –1 and x + y – 3√2 = 1, then what is the value of 12xy(x2 – y2)?

Δ ABC is right angled at B. If m∠A = 60°, then what is the value of sec C.sin A?