LENGKAP!! TRIK UTBK CIRI-CIRI BILANGAN YANG HABIS DIBAGI

Introduction

This tutorial provides essential tips and tricks for identifying numbers that are divisible by specific values, a crucial skill for preparing for the UTBK (Ujian Tulis Berbasis Komputer). Understanding how to determine divisibility can enhance your problem-solving skills in quantitative reasoning and mathematics.

Step 1: Understanding Divisibility Rules

To identify if a number is divisible by another, you need to know the basic rules of divisibility. Here are some key rules:

• Divisibility by 2: A number is divisible by 2 if its last digit is even (0, 2, 4, 6, 8).
• Divisibility by 3: A number is divisible by 3 if the sum of its digits is divisible by 3.
• Divisibility by 5: A number is divisible by 5 if its last digit is 0 or 5.
• Divisibility by 10: A number is divisible by 10 if it ends with 0.

Practical Tips

• Always check the last digit for rules involving 2, 5, and 10.
• For rule 3, practice calculating the sum of digits quickly.

Step 2: Applying the Rules

Once you understand the rules, apply them to various numbers. Here’s how to do it:

1. Choose a number you want to check for divisibility.

2. Apply the relevant rule based on the divisor.

   • For example, to check if 123 is divisible by 3:
     • Sum the digits: 1 + 2 + 3 = 6.
     • Since 6 is divisible by 3, 123 is also divisible by 3.

3. Practice with multiple examples to reinforce your understanding.

Step 3: Identifying Patterns

As you practice, look for patterns in numbers. For example:

• Numbers that are divisible by 6 must be divisible by both 2 and 3.
• If a number is divisible by 4, the last two digits must form a number that is divisible by 4.

Common Pitfalls

• Forgetting to sum all digits for divisibility by 3.
• Misjudging the last digit for evenness or oddness.

Step 4: Solving Practice Problems

To solidify your knowledge, solve practice problems. Here are some examples to try:

• Check if 144 is divisible by 4.
• Determine if 385 is divisible by 5.
• Is 125 divisible by 3?

Tips for Solving Problems

• Break down each problem step by step.
• Write down rules next to your practice questions for quick reference.

Conclusion

Mastering the divisibility rules is a valuable skill that will aid you in the UTBK and other mathematical challenges. Practice consistently, and apply these rules to various numbers to enhance your mathematical proficiency. For further practice, explore additional resources such as online quizzes and math problem sets. Keep a positive attitude and enjoy the learning process!