a number divisible by 7 and 3 but not by 21
Asked by roopali9457
| 22nd Jun, 2021,
07:59: AM
Expert Answer:
21 can be expressed as a product of prime numbers.
21 = 7 x 3.
Therefore, a number divisible by 7 and 3, still can't be divisible by 21 doesn't exist.
As 21 itself is a product of the 3 and 7 which are two prime numbers.
21 can be expressed as a product of prime numbers.
21 = 7 x 3.
Therefore, a number divisible by 7 and 3, still can't be divisible by 21 doesn't exist.
As 21 itself is a product of the 3 and 7 which are two prime numbers.
Answered by Yasmeen Khan
| 22nd Jun, 2021,
08:34: AM
Concept Videos
- 18÷3×(6-3)+2×9÷(4+2)
- please show the the divisibility of 2 rules
- divisible by 3
- what is meaning of divisible 2
- i want divisiblity of 11 rules with examples
- find the largest prime number required to test as a divisor to determine if the following number is a prime number. Also determine if the number is a prime number
- what is the divisibility method for 7
- i didn't understand divisibility rules can you please explain me
- cant understand concept of divisibility rule
Kindly Sign up for a personalised experience
- Ask Study Doubts
- Sample Papers
- Past Year Papers
- Textbook Solutions
Sign Up
Verify mobile number
Enter the OTP sent to your number
Change