61 is the prime number.
39 is divisible by 3 and 13.
27 is divisible by 9 and 3.
76 is divisible by several numbers, including 2.
The answer would be (2,3).
Try sketching it out, it helps :)
Answer:

Step-by-step explanation:
We can apply Pythagoras' Theorem.

Step-by-step explanation:
Distance = rate × time
If B is the rate of the boat, and C is the rate of the current, then we can write two equations:
18 = (B + C) × 3
18 = (B − C) × 9
Simplifying the equations:
6 = B + C
2 = B − C
Add the equations together to eliminate C:
8 = 2B
B = 4
Plug into either equation to find C:
C = 2
The boat's rate is 4 mph, and the current's rate is 2 mph.
Answer:
3
Step-by-step explanation:
15 fish / 5 days = 3 fish per day