The GCF of consecutive odd numbers is 1.
Two consecutive numbers (pressumably integers) will always add up to an odd number, so this has no solution. If you mean "two consecutive even numbers" or "two consecutive odd numbers", you should quickly be able to find a solution by trial-and-error.
20 and 21
HCF of 20 means the two numbers have common prime factors of 2, 2 and 5. However, LCM of 535 means that both of the numbers are odd. This cannot be the case if they have a prime factor of 2. Thus two numbers cannot have 20 as hcf and 535 as lcm.
The HCF is always a factor of the LCM of two numbers. The HCF is a factor of both the numbers which are factors of their LCM. Thus the HCF is also a factor of the LCM of the two numbers.
The HCF of the two numbers is 120
The HCF of two co-prime numbers is 1.
draw a flow chart to find hcf of two given numbers
You need at least two numbers to find an HCF.
Two or more numbers are needed to find the HCF
You need at least two numbers to find an HCF.
The HCF of the given two numbers is 40