Can you start the fire using two pieces of wood?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

How is the moon similar to a dollar?

what does this picture(rebus) riddle means ?

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

Which tank will fill first?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

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

Solve the rebus riddle in the picture below.

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?