Quantitative Aptitude - Arithmetic Ability Questions

If sin(A/2) = x, then the value of x is

The ratio of three numbers is 2 : 5 : 7. If their product is 1890, then what is the sum of the three numbers?

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 two successive discounts of 30% and 10% are given, then what will be the ratio of marked price to selling price?

What are the co-ordinates of the centroid of a triangle, whose vertices are A(1, -5), B(4, 0) and C(-2, 2)?

What is the value of (cos45° + 1/3) ?

Select the odd word from the given alternatives.

A man goes to a place on bicycle at speed of 16 km/hr and comes back at lower speed . If the average speed is 6.4 km/hr in total , then the return speed (in km/hr) is