Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

You have $100 with you and you have to buy 100 balls with it. 100 is the exact figure and you can't go below or above the numbers and you have to use the entire $100. If there is no kind of tax applied how many of each of the following balls will you be able to buy:

Green Balls costing $6
Yellow Balls costing $3
Black Balls costing $0.10

Now, how many of each must you buy to fulfil the condition given?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

0 0 0 = 6
1 1 1 = 6
2 2 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

You can use any mathematical symbols in the space provided to make all above algebraic expressions true.

All of Jacob's shoes are red except two.
All of Jacob's shoes are green except two.
All of Jacob's shoes are yellow except two.

How many shoes does Jacob have?

Find the value of "?" in the ball picture Riddle below:

I guess 76.8% of readers will like this riddle.

What's the least number of people should read this post?