Can you fill the blank with the correct number?

6 30 870 756030 _____

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

A man dies of old age on his 25 birthday. How is this possible?

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

Solve the counting riddle by identifying the number of triangles in the given picture.

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

You are given four tennis balls and asked to arrange those balls in a manner that the distance between each one of them is exactly equal. How will you do it?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Prove that twice of ten is the same as twice of eleven.