The first pair of two numbers follows some paired relationship, using a similar analogy to that of the first pair, find the missing number in the second pair :
63 ∶ 80 ∶∶ 15 ∶ ?
1
24
2
12
3
13
4
42
The first pair of two numbers follows some paired relationship, using a similar analogy to that of the first pair, find the missing number in the second pair :
63 ∶ 80 ∶∶ 15 ∶ ?