Quantitative Aptitude - Arithmetic Ability Questions

Point Q(-2,b) is the midpoint of segment EF. Co-ordinates of E are (-7,-6) and F are (a,0). What is the value of a and b?

The value of cos (1110°) is

What is the simplified value of (cosec A – sin A)(sec A – cos A)(tan A + cot A)?

What is the value of sin 5π/3?

If xy+yz+zx = 1, then the value of (1+y2)(x+y)(y+z) ?

Two numbers are 40% and 50% lesser than a third number. By how much percent is the second number to be enhanced to make it equal to the first number?

What is the value of (3/5 + 7/9)?

What is the slope of the line perpendicular to the line passing through the points (-5 , 1) and (-2 , 0)?