Answer:
The number is 24
Step-by-step explanation:
Let the two digits number be ab
In real terms, this is 10a + b
So, we have that the sum of the digits subtracted from 10a + b is 18
Mathematically, we have this as;
10a + b - (a + b) = 18
10a + b - a - b = 18
9a = 18
a = 18/9
a = 2
We are also told that the digit at the units place b is double the digit at the ten’s place a
That means b = 2a
b = 2 * 2 = 4
The common difference is that constant difference found when any term is subtract by the term preceding it...
d=17/9-18/9=16/9-17/9-15/9-16/9
d=-1/9
Answer:
20 mm
Step-by-step explanation:

Answer:
Assuming you want to know there was for UK it was 
Step-by-step explanation:
Let's add the fractions together

The remainder is the amount in UK so

Simplified it's 