What building has the most stories?

Find the smallest sentence with all the English alphabet.

Once upon a time, there was a castle on a square island. The entire island was surrounded by a 14m wide trench. The Romans had wanted to invade the castle and had brought a few wooden planks along with them to facilitate themselves in crossing the moat. The planks were however found to be only 13m long.

The Romans still managed to cross the trench. How did they do it?

Can you solve the photo plexer logic ?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

What goes up but never comes down?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.