What has 13 hearts but no other organs?

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

One day, I thought of ways that can be used for creating a palindrome. So I decided that I will turn into a larger number by adding the reversed digits to the original number and keep doing it till I finally obtained a palindrome.

I am not sure if this process will always result in a palindrome eventually but I was able to produce a four-digit palindrome. Can you guess my starting number?

What do the following words have in common?

Assess
Banana
Dresser
Grammar
Potato
Revive
Uneven
Voodoo

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

Which tank will fill first?

If you say my name, I will no longer exist. What am I?

Rose, Lily and Jasmine decided to buy flowers for their moms on Mother's Day. One of them bought lilies, the other roses, and the third one jasmines.
'It's funny!' said the girl with roses, 'we bought roses, jasmines and lilies, but none of us bought the flowers matching her name'.
'You're right!', said Lily.
What kind of flowers did each of the girls buy?

Why is the Hole below a Lock?