Quantitative Aptitude - Arithmetic Ability Questions

The 3rd and 6th term of an arithmetic progression are 13 and -5 respectively. What is the 11th term?

Δ XYZ is right angled at Y. If m∠Z = 30°. What is the length of YZ (in cm), if ZX = 9 cm?

The radius and height of a solid cylinder are increased by 2% each. What will be the approximate percentage increase in volume?

U, V and W together can make a chair in 20 minutes. U and V together can make it in 25 minutes. How much time will (in minutes) W alone take to make the chair?

cos(A+B) + cos(A-B) is equal to

(−12)[11+7×(−3)]÷{}[413−(−3)×(−6)]=

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

If in a two digit number, the digit at unit place is y and the digit at tens place is 5, then the number is