If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?

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

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Take away the whole and some still remain. What is it?

Can you solve this tricky maths equation problem by replacing it? mark with the correct symbol?

19834 -----: 187
15921 -----: 153
17561 -----: 139
13734 -----: ???

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Count the number of triangles in the given picture.

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

What's the only room from which no one can enter or leave

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?