Can you find out the remainder when 3^300 is divided by 5?

Can you name an animal whose killing cannot be performed without spilling your own blood?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

A swan sits at the center of a perfectly circular lake. At an edge of the lake stands a ravenous monster waiting to devour the swan. The monster can not enter the water, but it will run around the circumference of the lake to try to catch the swan as soon as it reaches the shore. The monster moves at 4 times the speed of the swan, and it will always move in the direction along the shore that brings it closer to the swan the quickest. Both the swan and the the monster can change directions in an instant.
The swan knows that if it can reach the lake's shore without the monster right on top of it, it can instantly escape into the surrounding forest.

How can the swan successfully escape?

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

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

What is both possible and impossible at the same time?

Can you Find and name the hidden bird in the picture below ?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

Move three sticks of the spiral below to form a square.

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?