Divisibility Rule
Divisibility Rule
- What is the divisibility by 2 Rule?
- Even numbers are multiples of 2. A number is even if ends in 0,2,4,6, or 8.
- What is the divisibility by 3 rule?
- A number is divisible by 3 if the sum of its digits is divisible by 3.
- 372, for instance, is divisible by 3 since sum of its digits (3+7+2) is 12. And 12 is divisible by 3.
- What is the divisibility by 4 rule?
- A number is divisible by 4 if the number\'s last two digits are divisible by 4
- 9,312, for instance, is divisible by 4 since its last 2 digits are 12. And 12 is divisible by 4.
- What is the divisibility by 5 rule?
- A number is divisible by 5 if its last digit is a 0 or 5.
- What is the divisibility by 6 rule?
- Since 6 is a multiple of 2 and 3, the rules for divisibility by 6 are a combination of the rule for 2 and the rule for 3.
- Divisibility by 8 Rule
- A number passes the test for 8 if the last three digits form a number is divisible 8.
- Divisibility by 9 Rule
- A number is divisible by 9 if the sum of the digits are evenly divisible 9.
- Divisibility by 10 Rule
- A number passes the test for 10 if its final digit is 0
Code: FLASK OC .
F : Fathima Beevi .
First woman judge in supreme court.
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Suppose there are n people in the party. The first person shakes hand with the other (n-1) guests. The second guest shakes hand with the other (n-2) guests. this will continue until the (n-1) th guest shakes hand with the nth guest.
Total number of handshakes is (n-1) + (n-2).. + 3 + 2 + 1. .
= ((n-1)(n))/2 .
For example, 6 people in a party shake hand with other guests. So how many handshakes will be there?.
=((6-1)(6))/2.
=15.
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