If \( a \otimes b \otimes c = \frac{a}{c} + \frac{b}{c}, \ then \ what \ is \ 5 \otimes 2 \otimes 6 = ? \)
If the sum of the numbers in any row, column, and main diagonal of the grid is equal to 15, then \( x = ? \)
If the product of three prime numbers is equal to 42, find their sum.
Find \( x \) from the given figure.
(Figure Description: Two identical congruent rectangles sharing a common vertex at the top. An isosceles triangle is formed between them at the bottom with a base angle of \( 65^\circ \). The right angles of the rectangles are adjacent to the angle \( x \).)
If \( 0.3 \) part of an unknown number is \( 9.6 \), what is \( 0.125 \) part of that number?
Which of the following numbers is the largest?
A. \( \frac{3}{2^3} \)
B. \( \frac{1}{4} \)
C. \( 0.235 \)
D. \( \frac{7}{16} \)
E. \( 0.625 \)
If the last digit of the number \( \underbrace{5 \cdot 5 \cdot 5 \cdot \dots \cdot 5}_{n \text{ times}} - \underbrace{2 \cdot 2 \cdot 2 \cdot \dots \cdot 2}_{n \text{ times}} \ \) is 7, which of the following can be the value of \( n \)?
A rectangle is divided into 4 smaller rectangles. The areas of three of them are written inside as shown in the figure. Find the area of the remaining rectangle.
There are a total of 20 blue, red, and green pencils in a box. The number of blue pencils is 6 times more than the number of green pencils. If the number of red pencils is less than the number of blue pencils, how many red pencils are in the box?
In an \( 8 \times 10 \) grid where each square cell has a side length of \( 1\text{ cm} \), find the area of the shaded region.
(Figure Description: A rectangular grid \( ABCD \) of size \( 8 \times 10 \). A shaded figure is contained inside, formed by subtracting large right-angled triangles from the total rectangle area.)