Question

▶Brainly Teaser ⬆⬆⬆◀

Solve the teaser! & get 50 points!​

Answer 1

Hey!! ☺

Here is your answer

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If we see properly,

The first picture shows 5 squares, the 4 smaller ones, along with the 2×2 square.
Counting 1×1, 2×2, and 3×3 squares, the second picture shows 14 squares.

With this reasoning, a 4×4 grid would equal 30.

In general, an n × n grid would equal

${1}^{2} + {2}^{2} + ... + {n}^{2} = \frac{n(n + 1)(2n + 1)}{6}$

These are the square pyramidal numbers, because they are the number of cubes needed to build a pyramid with a square base n levels high.

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Thanks!! ✌

Answer 2

The answer is provided in the attachment.