Quantitative Aptitude - Arithmetic Ability Questions

In a triangle XYZ , which of the following conditions is true

There is 40% increase in an amount in 10 years at simple interest. What will be the compound interest of Rs. 30000 after 3 years at the same rate?

Two trains, one 150 m long and the other 130m long, coming from opposite directions crosssed each other in 7.2 seconds. The sum of speed of the two trains every hour would then be

A sells vegetables at a profit of 35% and for weighing uses a weight which is 10% less than the article weight. What is total profit percentage?

The value of tan 315° cot (­ -405° ) is equal to

The sum of three numbers is 67. If the ratio of the first number to the second number is 3 : 5 and that of the second number to the third number is 4 : 7, then what is the second number ?

If x3-2x=3x, then the value of x2+1x2 will be

When 0.151515.....is converted into a fraction, then the result is