What brings you down but never up?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

How many words can a pen with half refill write?

Count the number of squares in the picture below.

There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.

Count the number of triangles in the given picture.

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

Dwayne Johnson was running away with the loot from a heist in his car along with Vin Diesel. One tire was punctured and he dropped down to replace it. While changing the wheel, he dropped the four nuts that were holding the wheel and they fell into a drain. Vin Diesel gave him an idea using which they were able to drive till the rendezvous point.

What was the idea ?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

Why do Chinese men eat more rice than Japanese men do ?