MCQ Subject: Number System & Arithmetic

The LCM of two numbers is 120 and their HCF is 5. What is the product of the two numbers?

A sequence starts as 3, 6, 12, 24, 48. What comes next if the pattern continues?

Identify the even number between 10 and 20 that is NOT divisible by 4 from the options given.

What is the nature of the sum of 45 consecutive integers starting from an odd number?

A number is divisible by 3 if the sum of its digits is divisible by 3. Which of the following numbers is NOT divisible by 3?

A rule to test divisibility by 7: Double the last digit, subtract from the remaining number. If the result is divisible by 7, the original number is too. Applying this to 161:

If HCF of 3/4 and 5/6 is 1/12, what would be the LCM of these fractions?

Two numbers are such that their HCF is 8 and LCM is 420. What is the product of the two numbers?

Which of the following numbers is NOT a perfect square?

In a group of 24 students, the ratio of students who prefer Mathematics to those who prefer Physics is 7:3. If the HCF of the number of students who prefer Mathematics and Physics is 7, find the number of students who prefer Physics.