Quantitative Aptitude - Arithmetic Ability Questions

If a - b = -7 and a2+ b2= 85, then find ab.

If a retailer offers a discount of 28% on the marked price of his goods and thus ends up selling at cost price, what was the % mark up?

The sum of the lengths of the edges of a cube is equal to the perimeter of a square. If the numerical value of the volume of the cube is equal to the numerical value of the area of the square, then the length of one side of the square is

Select the odd letters from the given alternatives.

What is the value of tan 6° tan 36° tan 84° tan 54° tan 45°?

The point Q(a,b) is first reflected in y­-axis to Q1 and Q1 is reflected in x­axis to (­-5,3). The co­ordinates of point Q are

If X is a prime number, LCM of X and its successive number would be

A train runs at 80 kmph for the first 40 km and the next 30 km at 60 kmph. Find the average speed.