Quantitative Aptitude - Arithmetic Ability Questions

If √[(1 + cosA)/2] = x, then find the value of x.

In triangle ABC, AB = 8 cm, angle A is bisected internally to intersect BC at D. BD = 6 cm and DC = 7.5 cm. What is the length of CA?

If 31% of an electricity bill is deducted, Rs 1794 is still to be paid. How much was the original bill amount?

What should be added to 5(2x-y) to obtain 4(2x - 3y) + 5(x + 4y)?

Select the odd number from the given alternatives.

What is the value of 53% of 7400?

The marked price of a book is Rs 4200. The shopkeeper gives two successive discounts of 25% and y% to the customer. If the customer pays Rs 2898 for the book, then what is the value (in percentage) of y?

2*[­0.3(1.3 + 3.7)] of 0.8 = ?