Asked by manishasain28 | 8th Feb, 2019, 04:09: PM

Expert Answer:

Divisibility test of 7:
1. Double the last number
2. Subtract this number from the remaining digits
3. If the number equals 0 or is divisible by 7 then the original number is divisible by 7.
 
Examples:
 
1. 224 
 
double of 4 = 8
 
22 - 8 = 14
 
We know that 14 is divisible by 7.
 
→224 is divisible by 7.
 
2. 147
double of 7 = 14
 
14 - 14 = 0
 
→147 is divisible by 7.

Answered by Yasmeen Khan | 8th Feb, 2019, 04:38: PM