Quantitative Aptitude - Arithmetic Ability Questions

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

A can paint a house in 55 days and B can do it in 66 days. Along with C, they did the job in 12 days only. Then, C alone can do the job in how many days?

A wholesaler sells a jacket to a retailer at a profit of 25% and the retailer sells it to a customer at a profit of 20%. If the customer pays Rs. 2,400, what had it cost (in Rs) the wholesaler?

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?

Select the odd letters from the given alternatives.

A student multiplied a number by 3/10 instead of 10/3. What is the percentage error in the calculation?

The number 3521is divided by 8. What is the remainder?

The zeros of the cubic polynomial 2x3-x2-2x+1 are a, b and c respectively. Find a+b+c :