Can you place six X (crosses) in below board without making three in a row in any way ?

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

What Does this text mean:

important=important

How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

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 ()

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

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

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