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 = ?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

A swan sits at the center of a perfectly circular lake. At an edge of the lake stands a ravenous monster waiting to devour the swan. The monster can not enter the water, but it will run around the circumference of the lake to try to catch the swan as soon as it reaches the shore. The monster moves at 4 times the speed of the swan, and it will always move in the direction along the shore that brings it closer to the swan the quickest. Both the swan and the the monster can change directions in an instant.
The swan knows that if it can reach the lake's shore without the monster right on top of it, it can instantly escape into the surrounding forest.

How can the swan successfully escape?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

What jumps when it walks and sits when it stands?

Can you count the number of triangles in the given picture?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

I am a ten letters word
The first four letters have the power to rule,
Next, four-letter can be eaten.
The next three-letter represents a lady.
I can fly as well

what am I looking for?