How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

I am the first thing you need while camping.
I am always with the person named Marcos Valencia and Carrick.
But Pogba Zlatan and Rooney think I am wasteful and do not need me.
I am the second to the last thing to add when you are making a patch.

What am I?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

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

John can eat 27 chocolates in an hour, Jacob can eat 2 chocolates in 10 minutes, and Jolly can eat 7 chocolates in 20 minutes. How long will it take them to share and eat a box of 120 chocolates whilst playing Chess?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

In the four images below, can you find the odd one out?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?