Solve the mathematical equation in the picture below.

The centre of the third figure is empty. What digit should fit inside?

There are 3 apples in the basket and you take away 2. How many apples do you have now?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

People are waiting in line to board a 100-seat aeroplane. Steve is the first person in the line. He gets on the plane but suddenly can't remember what his seat number is, so he picks a seat at random. After that, each person who gets on the plane sits in their assigned seat if it's available, otherwise, they will choose an open seat at random to sit in. The flight is full and you are last in line. What is the probability that you get to sit in your assigned seat?

Can you count the number of blocks in the picture below?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

Make a sentence consisting of three words that have the whole alphabet.

What is the next number in the series?

15 29 56 108 208 ?

I am eight letters long - "12345678"
My 1234 is an atmospheric condition.
My 34567 supports a plant.
My 4567 is too appropriate.
My 45 is a friendly thank-you.
My 678 is a man's name.

What word am I?