Quantitative Aptitude - Arithmetic Ability Questions

A shopkeeper by selling 13 Titan watches, earns a profit equal to the selling price of 3 Titan watches. His profit percentage is

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

Δ LMN is right angled at M. If m∠N = 45°, what is the length of MN (in cm), if NL = 9√2 cm?

Δ DEF is right angled at E. If m ∠D = 30°. What is the length (in cm) of DE, if EF = 2√3 cm?

If the parallel sides of a trapezium are 8 cm and 4 cm, M and N are the mid points of the diagonals of the trapezium, then length of MN is

The price of an article is discounted by 25%, to restore to its original value, the new price must be increased by

Three numbers are in the ratio of 3:5:10 and their LCM is 630. Find their HCF.

What is the value of √2 Sec 45 - Tan 30?