MCQ Subject: Number System & Simplification

If x is an odd integer, what can be said about the product of (x – 2) and (x + 2)?

For two positive integers, their HCF is 5 and the product of the numbers is 200. What is their LCM?

Which of the following decimals is equivalent to the fraction 3/4 in its simplest form?

If the HCF of two numbers is 12 and their product is 420*12, what is their LCM?

If n is an odd integer, which of the following must be true about the product (n)(n+1)(n+2)(n+3)?

A number that is neither a perfect square nor a perfect cube nor any higher power of an integer is best described as:

What is the nature of the number obtained by subtracting an odd number from an even number?

If the HCF of two numbers is 12 and their LCM is 420, what is the product of the two numbers?

Simplify the expression: 2√(25) + (√81)^2 – 5^2