Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

A father's child, a mother's child, yet no one's son.

Who am I?

What work can one never finish?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

Buy me, smell me or deliver me, I do not change.

Who am I?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

What does this rebus mean?

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John was drowned by he was not wet. How?