Can you find the odd number in the following?

2716, 4135, 5321 and 7145

Count the number of balls in picture below:

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

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?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

Alex opened 24 presents
Jonah opened 8 presents
Clara opened 1 present

Can you find out how many presents were opened by Candy?

The cream is heavier than Milk. True or False?

Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?