Find the absolute value of the following integers:

(a) -15 (b) 12 (c) 0

Draw a circle using a compass and mark:

(a) Centre as O (b) Radius as OA (c) Diameter as AB

Using the digits 3, 8, 0, 5 form:

(a) The greatest 4-digit number (without repeating any digit)

(b) The smallest 4-digit number (without repeating any digit)

Use prime factorisation to find the HCF and LCM of 24 and 32. Hence, verify that HCF × LCM = product of two numbers.