How about: 72
Chat with our AI personalities
It is: 84
72 and 90
The number is 64, or 80, or 96 .
To be a multiple of 4, 10 and 20 the number must be a multiple of their lowest common multiple. lcm(4, 10, 20) = 20 What is required is a multiple of 20 between 61 and 107. The numbers 80 and 100 both satisfy the problem of being between 61 and 107 and being a multiple of 4, 10 and 20.
64,72,80,88,96,104 :)