What word begins and ends with an E, but has only one letter?

Our product and our sum always give the same answer. Who are we?

You have a thousand Re. 1 coins with you. You have ten bags with you and you can put any number of coins in each of the bags. The condition is that if someone asks you for any amount between 1 and 1000, you must be able to give that amount by just giving the bag (you are not allowed to open the bag and give coins).

How will you do it?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

Which Burger Is Different in below image?

Find the number of squares in the below picture

I don't get anymore wetter, no matter how much rain falls on me.

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

Replace the question mark with the correct number in below Picture:

Find the next number in the sequence

1, 2, 6, 21, 88, __?