MCQ Subject: Number System & Arithmetic

Identify the even number in the sequence: 13, 18, 21, 25

If the HCF of two numbers is 12 and their LCM is 420, which of the following cannot be the product of the two numbers?

What is the nature of the result when an even number is subtracted by an odd number?

Which of the following is divisible by 11?

If 18 workers finish a project in 14 days and 12 workers would take 21 days, how many days would 6 workers take to complete the same project?

Which of the following numbers is divisible by 7 using the rule that involves subtracting twice the last digit from the remaining part of the number?

Which number comes next in the sequence: 2, 6, 12, 20, 30, …?

What can be said about two numbers whose product is even but their sum is odd?

Two numbers have an HCF of 5 and a product of 175. What is their sum?

A bus service operates every 12 minutes, another every 15 minutes, and a third every 20 minutes. What is the smallest time interval after which all three buses will depart together?