In a concert, Christina is performing a dance show with her group.
At 10:00, she and her crew were dancing in an absolutely straight line. At that time Christina was standing in 4th position from both the front and back end of the row.

What was the size of her crew?

what's the probability of getting a king or a queen from a pack of 52 cards?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

If six children and two dogs were under an umbrella, how come none of them got wet?

What is the riddle which can be asked all day with a different correct answer each time.

Solve the equation in the image by looking at the pattern closely.

I hide my treasure in the ground, my tail is big and fluffy. If you spot me in a tree, please don’t call me scruffy. What am I?

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

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?