Quantitative Aptitude - Arithmetic Ability Questions

A merchant changed his trade discount from 25% to 15%. This would increase selling price by

An octahedron has 6 vertices. How many edges does it have?

If 3x+22x+1 = a2x+1+bx+2 be an identity, then the value of b

If ( x - 5)2 + (y - 2)2 + (z - 9)2 = 0, then value of (x + y - z) is

Find the LCM of 12, 16, 20 and 24.

What will be the net discount (in percentage) for two successive discounts of 30% and 20%?

What is the measure of the smaller of the two angles formed between the hour hand and the minute hand of a clock when it is 5:49 p.m.?

In the following question, select the odd letter group from the given alternatives.