The following are math problems. Complete them by filling in the boxes.

Here are the solutions to your math problems:

1. Write down the missing numbers in the following patterns:

a) The pattern increases by 5 each time.

$$-25, -20, \boxed{-15}, \boxed{-10}, \boxed{-5}, 0, 5, 10, \boxed{15}, \boxed{20}$$

b) The pattern increases by 1 each time.

$$-6, -5, -4, \boxed{-3}, \boxed{-2}, -1, 0, 1, 2, 3, \boxed{4}, \boxed{5}, 6, 7, 8, 9, 10, 11$$

2. Use one of the following signs, $<, >,$ or $=$, to make these sentences true:

a) $27 \boxed{>} 1$

b) $13 + 6 \boxed{>} 0$ (since $13+6=19$)

c) $4 \boxed{>} 0$

d) $-5 \boxed{>} -8$

3. Write down the missing numbers to complete the following sentences:

a) $-9 \times \boxed{3} = -27$

b) $32 \div \boxed{4} = 8$

c) $36 \div 2 = \boxed{18}$

d) $5 \times \boxed{7} = 35$

e) $64 \div \boxed{8} = 8$

4. Arrange the following numbers:

a) Arrange the following numbers in ascending order: $48, -50, -12, 0$

$$\boxed{-50, -12, 0, 48}$$

b) Arrange the following numbers in descending order: $-36, 24, -15, 1$

$$\boxed{24, 1, -15, -36}$$

5. Evaluate (find the value of):

a) $12 - 6 - (-10)$