Quantitative Aptitude - Arithmetic Ability Questions

X and Y are two alloys which are prepared by mixing zinc and aluminium in the ratio of 1 : 4 and 11 : 8 respectively. If equal quantities of alloys are melted to form a third alloy Z then what is the ratio of zinc and aluminium in alloy Z?

A person borrows some money for 8 years at a rate of simple interest. If the ratio of principal and total interest is 5 : 8, then what is the rate ( inpercentage) of interest?

The ratio of cost price and selling price 25:26. The percent of profit will be

Josna takes 4 hrs 30 min in walking a distance and riding back to some place where she started. She could walk both ways in 5 hrs 40 min. The time taken by her to ride back both ways is

If a2+1=9a, (a≠0) then the value of a2+1a2 is

What is the value of [1/(1 – tan θ)] – [1/(1 + tan θ)]?

What is the value of (√3 - sec60) ?

ΔPQR is right angled at Q. If m∠R = 45°, then find the value of (tanP - 1/2).