Evaluate the following:

[ (100 ÷ 5 + 6) x 4 ] - 20

During a sale, the number of shirts bought in a store increased from 20 to 25.

Calculate the percentage increase in the number of shirts bought.

Find the LCM of 12, 18, and 30.

Find the sum of perfect squares between 20 and 40.

An educational television programme started at 9:25 am. It lasted for $$1\frac{3}{4}$$  hours.

What time did the programme end?

Given that

$$F=\frac{9c}{5}+32$$

Find the value of c when F=50 

Using the numbers below,

2, 9, 16, 21, 57, 81

Write down:

An odd number that is divisible by 7.

Find the square root of $$2\frac{7}{9}$$  .

Give your answer to 2 decimal places.

Evaluate 58 ÷ 0.02.

Estimate the value of $$\frac{4.9963\times\left(-8.006\right)^2}{0.9863}$$  ,

giving your answer to one significant figure.

Find the value of $$4^2-\sqrt[]{64}$$  .

Liza earns $3200 a month. She spends $$\frac{3}{8}$$  of her salary every month. She gives her parents $$\frac{2}{5}$$  of the remainder and saves the rest. How much money does she save every month?