What number should come in place of the question mark below?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Can you discover the missing number in this series?

37, 10, 82
29, 11, 47
96, 15, 87
42, ?, 15

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

Jack have ten pairs of black socks, eight pairs of white socks and seven pairs of green socks. Everything is mixed in a draw. As there is no light he were not able to identify the colour of the socks. How many of the socks did he want to take to match one pair

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?