'Arduous' means requiring a lot of effort, which is synonymous with 'Difficult'.

'Risk' is a synonym for 'chance' when discussing the uncertainty of outcomes.

'Hardworking' is a synonym for 'diligent', meaning showing care and effort in one's work.

A cuboid is defined as a three-dimensional shape with six rectangular faces.

'Configuration' refers to the specific arrangement of numbers on the die.

A cube has 12 edges.

A cuboid has 12 edges.

The combinations to get a sum of 8 are (2,6), (3,5), (4,4), (5,3), (6,2), totaling 5 ways.

12% of 150 is 0.12 * 150 = 18.

'Fits like a glove' means something fits perfectly, similar to how a cube fits into a cubical space.

'On cloud nine' means to be very happy.

'Catch on' means to understand something.

'Burning the midnight oil' means to be very busy, especially working late.

'Let the cat out of the bag' means to accidentally reveal a secret.

'Bite the bullet' means to take a risk or face a difficult situation.

K is the 11th letter. 11 - 5 = 6, which corresponds to F.

Two places before D (D, C, B) is B.

The series is in reverse alphabetical order, so after X comes W.

The series is in reverse alphabetical order, so after W comes V.

All numbers except 20 are multiples of 3.

All are powers of 2 except 20.

All numbers except 30 are perfect squares.

This is the Fibonacci sequence where the next number is the sum of the two preceding ones: 3 + 5 = 8.

The series is doubling each time: 2*2=4, 4*2=8, 8*2=16, so the next is 16*2=32.

The differences are 3, 5, 7, 9; next difference is 11; 27+11=38.

Cacophony is defined as a harsh, discordant mixture of sounds.

'Sycophant' refers to a person who acts obsequiously towards someone important.

'Ephemeral' refers to something that lasts for a very short time.

'Only A' refers to the part of circle A that does not overlap with circle B, which is 'A but not B'.

'A blessing in disguise' refers to something that seems bad at first but results in something good.