Quantitative Aptitude - Arithmetic Ability Questions

In the given figure, OX, OY and OZ are perpendicular bisectors of the three sides of the triangle. If QPR = 65 deg and PQR = 60 deg, then what is the value (in deg) of QOR + POR ?

Nine years later, age of B will be equal to the present age of A. Sum of A's age 3 years later and B's age 4 years ago is 76. If C is half of the present age of B, then what will be C's age (in years) after 10 years?

Dev lent Rs. 8000 to Jairam for 17 years and Rs. 4700 to Karnik for 16 years on simple interest at the same rate of interest and received Rs. 21120 in all from both of them as interest. The rate of interest per annum is:

Sum of lengths of all edges of a cube is 84 cm, find its volume?

A does 50% of a work in 12 days. He then calls in B and they together finish the remaining work in 8 days. How long B alone would take to complete the whole work?

ABCDEF is a regular hexagon of side 12 cm. What is the area (in cm2) of the triangle ECD?

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

Select the odd word/letters/number/number pair from the given alternatives.