By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

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?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

What always comes into a house through the keyhole?

Which word does the below Plexor means ?

Akbar called Birbal and asked him to draw a line on the floor. He asked Birbal to make that line smaller without erasing it. Birbal smiled and did it before Akbar could blink his eyes.

How did he managed to do it?

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?

If an electric train is travelling south, then which way is the smoke going?

In a guessing game, five friends had to guess the exact numbers of apples in a covered basket.
Friends guessed 22, 24, 29, 33, and 38, but none of the guesses was correct. The guesses were off by 1, 8, 6, 3, and 8 (in random order).

Can you determine the number of apples in a basket from this information?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?