The number is 90.
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.
It is: 80
90
98
It is: 80
80
The number is 80
80 adn 100
All numbers that are multiples of all 2, 8 & 10 are multiples of their lowest common multiple which is 40.The multiples of 40 are 40, 80, 120, 160, ... of which only 80 is between 61 and 107.
The only such number between 55 and 101 is 80.
13 has a multiple of 26
The number 20 is.