Divisibility Rule of 143

The divisibility rule for 143 is a method by which we can find out if a number is divisible by 143 or not without using the division method. Check whether 2145 is divisible by 143 with the divisibility rule.
 

Step 1: Separate the last three digits of the number. Here in 2145, the last three digits are 145.
 

Step 2: Subtract this three-digit number from twice the remaining part of the number. In this example, 2 × 2 = 4, and 145 - 4 = 141.
 

Step 3: Since 141 is not a multiple of 143, 2145 is not divisible by 143. If the result from step 2 is a multiple of 143, then the number is divisible by 143.
 

Learning the divisibility rule will help kids to master division. Let’s learn a few tips and tricks for the divisibility rule of 143.
 

• Know the multiples of 143: Memorize the multiples of 143 (143, 286, 429, 572, ... etc.) to quickly check divisibility. If the result from the subtraction is a multiple of 143, then the number is divisible by 143.
   
• Repeat the process for large numbers: Students should keep repeating the divisibility process until they reach a small number that is divisible by 143. 
  
  For example: Check if 11443 is divisible by 143 using the divisibility test. Separate the last three digits, 443, and subtract it from twice the remaining digits: 2 × 11 = 22, 443 - 22 = 421. Since 421 is not a multiple of 143, 11443 is not divisible by 143.
   
• Use the division method to verify: Students can use the division method as a way to verify and crosscheck their results. This will help them to verify and also learn.
   

• Divisibility rule: The set of rules used to determine whether a number is divisible by another number. 
   
• Multiples: Results obtained by multiplying a number by an integer. For example, multiples of 143 are 143, 286, 429, 572, ...
   
• Subtract: To take away a number from another to find the difference.
   
• Integers: Numbers that include all whole numbers, negative numbers, and zero.
   
• Verification: The process of confirming the correctness of a result, often by using an alternative method like division.