Quantitative Aptitude - Arithmetic Ability Questions

A tetrahedron has 4 vertices. How many edges does it have?

Find the value of 532+108

If a + b + c + d = 4, then the value of 1(1-a)(1-b)(1-c) + 1(1-b)(1-c)(1-d) + 1(1-c)(1-d)(1-a) + 1(1-d)(1-a)(1-b)

What is the value of tan150°?

Dipali bought a set of cups for Rs. 375, but then had to sell it later to clear old stocks for Rs. 345. What is the percentage of loss that she incurred?

A sum of Rs 4000 becomes Rs 7000 in 6 years at simple interest. If the rate of interest becomes double of itself, then what will be the amount (in Rs) after 6 years?

Twenty one times of a positive number is less than its square by 100. The value of the positive number is

What is that least number that must be added to the product 684 × 686 to make it a perfect square?