What question can you never answer yes to?

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?

What English word has three consecutive double letters?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

There is a square piece of paper with a hole that is denoted by the circle on the top right side in the given picture. You have to cut the paper in a manner that it forms two and only two separate pieces of paper and then rearrange the pieces in a manner that the holes come in the centre of the paper.

On a bright sunny day, two fathers took their son fishing in the lake. Each man and son were able to catch one fish. When they returned to their camp, there were only three fishes in the basket. What happened?

PS: None of the fish were eaten, lost, or thrown back.

why number 8549176320 is one of a kind?