Quantitative Aptitude - Arithmetic Ability Questions

If the perimeter of a semi-circle is 108 cm, then find its radius (in cm).

The length of the diagonal and the breadth of a rectangle is 26 cm and 10 cm respectively. Calculate its area (in cm2).

In a class, 60% of children like Mathematics, 45% like Science and 25% like both Mathematics and Science. What is the percentage of children who like at least one subject?

If x2+ x = 19, then what is the value of (x + 5)2+ [1/(x + 5)2]?

a% of b + b% of a = ______

What is the unit digit of the sum of first 111 whole numbers?

A spaceship travels at 1,260 km/h. How many metres does it travel in 1/10 th of a second?

A dishonest shopkeeper professes to sell goods at his cost price but uses a false weight of 950 gms, for each kilogram. His gain percentage is