Quantitative Aptitude - Arithmetic Ability Questions

The mean of 10 observations is 13. Two more observations are included and the new mean becomes 14. The mean of two new observations is

The least number, which when divided by 5, 6, 7 and 8 leaves a remainder 3 in each case, but when divided by 9 leaves no remainder, is:

A right circular solid cylinder has radius of base 7 cm and height is 28 cm. It is melted to form a cuboid such that the ratio of its side is 2 : 3 : 6. What is the total surface area (in cm2) cuboid?

Find the greatest number among 213, 312, 1, 516

30% discount is offered on an item. By applying a promo code the customer wins 10% cash back. What is the effective discount?

In the following question, select the odd letters from the given alternatives.

A tetrahedron has 4 vertices. How many edges does it have?

The height and the slant height of a right circular cone are 24 cm and 25 cm, respectively. Considering π as 22/7 , find the curved surface area of the said cone.