Which city is three-fifths chick two third cat and 50% goat?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

Can you find a five letter word that is left with only two letters if one is removed?

A gardener planted the Lemon trees in a mathematical ordered way (i.e. he planted a tree in rows).
He created a total of 19 rows of trees.

Note: There should be more than 2 trees to count as a row.

What is the minimum number of trees required by the gardener to have 19 rows of trees?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

What jumps when it walks and sits when it stands?

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?

Prove that the below maths equation is true.

8 + 8 = 91

I am a five-letter word under you,
Remove the first letter and I am above you,
Remove the second as well and I am around you.

Who am I?