What is always in front of you but can’t be seen?

You bought me for dinner but never eat me. What am I?

Different lights make me strange by changing me into different sizes. What am I?

Can you move 2 matchsticks to form four equal sized squares.

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

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

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?