12 – 24 + 25 = ?

$$32\times2-300\div5 = ?$$

Find all the greatest common factors of 22, 55, 128 and 32.

Find the least common multiple of 36, 4, 12, 5 and 10.

$$\frac{3}{4}\times(12-\frac{2}{5})=?$$

$$39\div34-128\div289=?$$

$$3\frac{2}{5}+6\frac{2}{5}-4\frac{1}{10}=?$$

$$\frac{12}{13}\times2-(3+\frac{2}{7})=?$$

$$25 – 0.86\times5 – 6.85=?$$

Which one is a prime number?

Find the difference between the area and circumference of the circle. ($$\pi = \frac{22}{7}$$)

Find the area of this trapezoid.

Find the angle x.

Find the volume of this prism.

Find the surface area of the cylinder. ($$\pi=\frac{22}{7}$$ is given)

Find the volume of this prism:

What percentage of 28 is 25% of 70?

Solve the following equation:

$$12+x = 8\times2$$

$$\frac{1}{2}[(\frac{3}{4}\times10+\frac{12.5}{5})-(2+4)]-(0.7\times\frac{16}{14})=?$$

$$\sqrt{256}+\sqrt{144}=?$$

$$\frac{\sqrt[3]{8}\times\sqrt[3]{125}}{\sqrt[3]{1000}}$$

Find one angle of the equal-sized-octagon below:

Find the angle x in the figure below:

If 24 bottles of water weigh 12.5 Kg and a swimming pool contains 480,000 bottles worth of water. How many Kg of bottles of water would it take are necessary for filling 5 swimming pools?

A cylinder shaped pool has the height of 2.8m, and radius of 12m. A tap can output water at the rate of 200L per minute. How long does it take for 16 taps to fill up the entire pool? ($$\pi=\frac{22}{7}$$ is given)