Spot what is wrong here in below Picture?

What is the next number in this matchsticks series riddle?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Jack and Joseph are well-known golf rivals. One Day during a match, they were level at a score of 30. Jack hit a bad shot and Joseph added 10 to his score. Joseph then hit an awesome shot and he won the game.

How ?

What four weights can be used to balance from 1 to 30 pounds?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

You are mixing a mixture of cement and Sand with five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four-gallon bucket and a seven-gallon bucket and neither has graduation marks. Find a method to measure five gallons.

When monkey rotate the gear, which mark will be hit 1 or 2 ?

Can you replace the question mark with the correct number?