I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

You need to remove four matchsticks from the picture below and still need to maintain the following as in the original image.
1. 1st row contains 12 matchsticks
2. 2nd row contains 12 matchsticks
3. 1st column contains 12 matchsticks
4. 2nd column contains 12 matchsticks

Can you write down eight eights so that they add up to one thousand?

How many Watermelons are there in the below picture?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

Can you start the fire using two pieces of wood?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?