Quantitative Aptitude - Arithmetic Ability Questions

If the ratio of the cost price and the selling price of an article be 4:5, then the percentage of profit is:

cot2A + cos2A is equal to

(1 + sec 20° + cot 70°)(1 - cosec 20° + tan70°) is equal to

The cost of leveling a triangular piece of land whose sides are 72 m. 30 m and 78 in respectively at the rate of 20 paisa per square metre is:

To travel 672 km, an Express train takes 14 hours more than Rajdhani. If however, the speed of the Express train is doubled, it takes 8 hours less than Rajdhani. The speed of Rajdhani is

If 2x-y2+(3y-2z)2=0,then the ratio of x:y:z is

In the following question, four number pairs are given. The number on left side of (–) is related to the number of the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

The marked price of an article is 40% more than its cost price. If 15% discount is given on the marked price, then what will be the profit percentage?