Quantitative Aptitude - Arithmetic Ability Questions

Pick the odd one out from the following

Solve the following 7 x {4 + (-2) x (-3)} = ?

A cone is hollowed out of a solid wooden cube of side 6 cm. The diameter and height of the cone is same as the side of the cube. What is the volume of the remaining cube?

The angle of elevation of the top of a pillar from the foot and the top of a building 20 m high, are 60° and 30° respectively. The height of the pillar is

In which of the following quadrilaterals only one pair of opposite angles is supplementary?

The value of Sin 60 is

Which of the following is a Pythagorean triplet?

A 25m long ladder is rested on a wall. The foot of the ladder is 7m away from the wall. If the end of the ladder (resting on the wall) slides down 4m, then how far will its foot move away?