Quantitative Aptitude - Arithmetic Ability Questions

In a Δ ABC, DE || BC. D and E lie on AB and AC respectively. If AB = 7 cm and BD = 3cm, then find BC:DE

A factory buys 10 machines. 1 Machine­A, 4 Machine­B and rest Machine­C. Prices of the machines are Rs 90000, Rs 40000 and Rs 40000 respectively. Calculate the average cost of these machines?

7 litres mixture of milk and water contains 30% water. 3.5 litres of milk is added to this mixture. What is the percentage of water in the new mixture?

The 2nd and 6th term of an arithmetic progression are 8 and 20 respectively. What is the 20th term?

The figure shown below consists of the tangents at the extremeties of any chord. Choose the correct option given below.

Which of the following value of 'x' satisfies the equation 814x+4 = 2432x+8?

If  a+1/a = 3, then a3+1a3?

Coefficient of x in (x + 8)(6 -­ 3x) is