Hint: What fraction of the did I eat?

Answer: 335 strawberries.

Working backwards...

I ended up with 34 strawberries, so I had 102 before giving Charlie two thirds.

I ate 6 myself, so I had 108 before I ate those.

I had 108 strawberries, so I had 162 before giving Blake one third.

I ate 3 myself, so I had 165 before I ate those.

I had 165 strawberries, so I had 330 before giving Alex one half.

Ate 5 myself, so I had 335 before I ate those.

Therefore I started with 335 strawberries.

Hint: Think about one face at a time.

Answer: 1,352 small cubes.

The original large cube with 16 small cubes along each edge would required 16 x 16 x 16 = 4,096 small cubes.

Removing the outside layer would leave a large cube now with 14 small cubes along each edge (which requires 14 x 14 x 14 = 2,744 small cubes).

It isn't 15 small cubes because you're removing both ends of an edge.

Therefore you have removed 4,096 - 2,744 = 1,352 small cubes.

Hint: The area of a circle is π x Radius².

Answer:
Circle: 3.5.

Square: 3.1.

Triangle: 4.7.

Doughnut

The area of a circle is π x Radius².

The larger circle has diameter = 4, therefore the radius is 2, and the area is π x 2² = 4π.

The smaller circle has diameter = 2, therefore the radius is 1, and the area is π x 1² = π.

Therefore the shaded area is 4π - π = 3π ≈ 9.42.

Circle

The area of a circle is π x Radius².

The circle with diameter 3.1 has a radius of 1.55 and an area of π x 1.55² = 7.55.

The circle with diameter 3.5 has a radius of 1.75 and an area of π x 1.75² = 9.62 (** closest match).

The circle with diameter 3.9 has a radius of 1.95 and an area of π x 1.95² = 11.95.

Square

The area of a square is Side x Side.

The square with side 3.1 has an area of 3.1 x 3.1 = 9.61 (** closest match).

The square with side 3.5 has an area of 3.5 x 3.5 = 12.25.

The square with side 3.9 has an area of 3.9 x 3.9 = 15.21.

Triangle

The area of a triangle is ½ x Base x Height. Using Pythagoras' theorem it can be shown that the area of an equilateral triangle is Sqrt(3) x Base² ÷ 4.

The triangle with side 3.9 has an area of Sqrt(3) x 3.9 x 3.9 ÷ 4 = 6.59.

The triangle with side 4.3 has an area of Sqrt(3) x 4.3 x 4.3 ÷ 4 = 8.01.

The triangle with side 4.7 has an area of Sqrt(3) x 4.7 x 4.7 ÷ 4 = 9.57 (** closest match).

Hint: The answer is over 35.

Answer: 37.