Quantitative Aptitude - Arithmetic Ability Questions

The marked price of a pen is Rs 3000. The shopkeeper gives two successive discounts of 15% and a% to the customer. If the customer pays Rs 2142 for the pen, then what is the value (in percentage) of a?

The smallest number that must be subtracted from 2800 so that the obtained number is a perfect square is

What is the least number that should be added to the product 11 x 12 x 13 x 14 to make it a perfect square?

At 6% simple interest per annum a sum of money became Rs. 834 in 6.5 years. The sum initially invested was

The mid points of AB and AC of the Δ ABC are P and Q respectively. If PQ = 6 cm, then the side BC is

If  x = 2+3,then what is the value of 2x + 12x ?

If x + [1/(x + 7)] = 0, then what is the value of x – [1/(x + 7)]?

The bar chart given shows the sales of 3 types of cars in the Indian automotive industry over 4 years. All the sales figures have been shown in terms of 000 units.

If all the 3 categories increase by same rate in 2013 over 2012 as they did in 2012 over 2011, then what will be the total approximate sales (in ‘000 units) of all the 3 categories taken together in year 2013?