Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

Can you count the number of triangles in the given picture?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

I am sure no one can have two things for dinner. what are they?

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

A very interesting trivia question for all.

Why do men's shirts have their buttons on the right side and women's have buttons on the left-hand side?

On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?