Quantitative Aptitude - Arithmetic Ability Questions

If 11+11+11+1x = 58, then what is the value of x?

If after giving a discount of 18%, a book is sold for Rs 1599, then what will be the marked price (in Rs) of the book?

If a cone of radius 3.5 cm and height 9.6 cm is melted and constructed into a cylinder of the same radius, what will be the height of this cylinder? (Take π = 22/7)

In a Δ ABC, DE || BC. D and E lie on AB and AC respectively. If AB = 7 cm and BD = 3cm, then find BC:DE

Reflection of the point (-3,6) in the x-axis is

If the perimeter of a semicircle is 36 cm, then find its area (in cm2).

The third proportional of two numbers 24 and 36 is

If a - b = -7 and a2+ b2= 85, then find ab.