What's the only room from which no one can enter or leave

Three playing cards in a row. Can you name them with these clues? There is a two to the right of a king. A diamond will be found to the left of a spade. An ace is to the left of a heart. A heart is to the left of a spade. Now, identify all three cards.

What do you think with the below Picture ?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

I am the first thing you need while camping.
I am always with the person named Marcos Valencia and Carrick.
But Pogba Zlatan and Rooney think I am wasteful and do not need me.
I am the second to the last thing to add when you are making a patch.

What am I?

What has one letter and starts with an E?

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

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

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

You need to move three matchsticks to form three squares. Can you do it?

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