Quantitative Aptitude - Arithmetic Ability Questions

The first and last terms of an arithmetic progression are 32 and ­-43. If the sum of the series is ­-88, then it has how many terms?

Sum of a fraction and thrice its reciprocal is 31/6. What is the fraction?

A boy starts from his house and walks at a speed of 5 km/hr and reaches his school 3 minutes late. Next day he starts at the same time and increases hisspeed by 4 km/hr and reaches 3 minutes early. What is the distance (in km) between the school and his house?

If a + b = ­ 8 and a2 + b2 = 34, then value of ab is

If the radius of a circle is decreased to 25% of its original value, calculate the percentage decrease in the area of the circle

If 15% of x is three times of 10% of y, then x:y = 

Rajan sells a machine for Rs 52 lakhs at a loss. Had he sold it for Rs 62 lakh, his gain would have been 9 times the former loss. What is the cost price of the machine?

The average age of a class of 6 girls is x years. Four new girls having ages x – 2, x + 2, x + 4 and x + 6 joins the class. What is the new average age (in years) of the class?