What number must be subtracted from each of the numbers 23, 30, 57 & 78 so that the remainders are in proportion?
3
12
6
9
15
What number should be subtracted from each of the number 23, 30, 57 and 78; so that the remainders are in proportion?
What least number of must be subtracted from each of the numbers 7, 17 and 47 so that the remainders are in continued proportion ?