Quantitative Aptitude - Arithmetic Ability Questions

Smaller diagonal of a rhombus is equal to length of its sides. If length of each side is 4 cm, then what is the area (in cm2) of an equilateral triangle with side equal to the bigger diagonal of the rhombus?

15 years ago Cynthia was thrice as old as Brittany. The sum of their present ages is 94 years. How old is Brittany now?

Find measure of central angle of the sector whose perimeter is 25 cm and radius of the circle is 7 cm?

Two trains are running in opposite directions with the same speed. If the length of each train is 486 metres and they cross each other in 27 seconds, then what is the speed (in km/hr) of each train?

Calculate the value of 61681 x 61681 - 31681 x 3168130000?

If (4x - 3) - (2x + 1) = 4, then the value of x is

If x2 + y2 + 6x + 5 = 4(x - y) then x - y is

What is the value of tanπ4+A×tan3π4+A ?