Divisibility Rule of 155

The divisibility rule for 155 is a method by which we can find out if a number is divisible by 155 or not without using the division method. Check whether 3100 is divisible by 155 with the divisibility rule.

Step 1: Check if the number is divisible by both 5 and 31, since 155 = 5 × 31.
- For divisibility by 5, the number must end in 0 or 5. Here, 3100 ends in 0.

Step 2: Check for divisibility by 31. Take the number formed by the last two digits and double it. Subtract this result from the rest of the number. 
- Here, take 00 (last two digits) and double it: 00 × 2 = 0. 
- Subtract this from the remaining number: 31 - 0 = 31.

Step 3: Since 31 is divisible by 31, 3100 is divisible by 155.
 

Learn divisibility rules to help master division. Let’s learn a few tips and tricks for the divisibility rule of 155.

• Know the multiples of 155: Memorize the multiples of 155 (155, 310, 465, 620…etc.) to quickly check divisibility. If the final result is a multiple of 155, then the number is divisible by 155.
   
• Use the division method to verify: Students can use the division method as a way to verify and cross-check their results. This will help them to verify and also learn.
   

• Divisibility rule: The set of steps used to find out whether a number is divisible by another number without direct division.
   
• Multiples: The results obtained by multiplying a number by an integer. For example, multiples of 155 are 155, 310, 465, etc.
   
• Integers: Numbers that include all whole numbers, negative numbers, and zero.
   
• Subtraction: The process of finding the difference between two numbers by reducing one number from another.
   
• Division method: A mathematical operation to verify divisibility by dividing one number by another.