Quantitative Aptitude - Arithmetic Ability Questions

What is the HCF of 36, 72 and 126?

ABC is a right angled triangle with angle A = 90 deg. Then the value of cos2A+cos2B+cos2C is

A right circular cylinder has height as 18 cm and radius as 7 cm. The cylinder is cut in three equal parts (by 2 cuts parallel to base). What is the percentage increase in total surface area?

If a+1a=1,then the value of a2-a+1a2+a+1 is a≠0

12 men or 30 boys can complete a work in 72 days. How many days will 48 men and 24 boys will take to complete the same work?

If P : Q : R = 6 : 7 : 8 and R : S = 3 : 5, then what is P : S?

The sum for 2 years gives a compound interest of Rs 3225 at 15% rate. Then sum is

The income of Rahul is Rs 60000 and his expenditure is Rs 40000. If his income is increased by 20% and expenditure in increased by 15%, then what will be the percentage increase in his savings?