You order chicken wings at KFC in the boxes of 6, 9 and 20. What is the largest number of wings that you cannot obtain by buying in any combination of the boxes?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

Spot 5 differences in two Christmas tree below:

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

I am Huge on Sunday and Saturday.
I am small from Tuesday to Thursday.
I do not exist on Monday and Friday.
Who am I?

I am a number I am not an odd number I am higher than 90 I am not higher than 100 If you subtract me from 100, you get nothing. What number am I?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

What is so fragile that saying its name breaks it?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?