Quantitative Aptitude - Arithmetic Ability Questions

If  a+1/a = 3, then a3+1a3?

CAlculate : 72-6-45÷5-72-2×2÷2+2

If the perimeter of a semi-circle is 36 cm, then find its radius (in cm).

D and E are points on side AB and AC of ΔABC. DE is parallel to BC. If AD:DB = 2:5 and area of ΔABC is 98 cm sq, what is the area (in sq cm) of quadrilateral BDEC?

If x2+5x+6 = 0, then the value of 2xx2-7x+6 is

Select the odd word from the given alternatives.

In an army selection process, the ratio of selected to unselected was 3:1. If 60 less had applied and 30 less selected, the ratio of selected to unselected would have been 5:1. How many candidates had applied for the process?

The age of Dr. Pandey is four times the age of his son. After 10 years , the age of Dr. Pandey will be twice the age of his son . The present age of Dr. Pandey's son is