Two brothers fishing problem

by Anthony Lahmann   Last Updated October 10, 2019 05:20 AM

Two brothers A and B are fishing. Person A says he got 10 fish. Person B says he got 12 fish. However, person A says: You need to multiply any number B says by $\frac{3}{4}$ to get the real answer! Person B says: You need to add $1$ to any number A says to get the real answer! How many fish did A catch? How many fish did B catch?

Answers 3

Just follow the instructions. $12*\frac{3}{4}=9$, so B caught 9 fish. $10+1=11$, so A caught 11 fish.

H Huang
H Huang
April 15, 2019 02:34 AM

B said he got 12 fish, but according to As statement he got 9 fish.

A said he got 10 fish but according to Bs statement he got 11 fish.

Hence final answer

A:11& B:9

Samar Imam Zaidi
Samar Imam Zaidi
April 15, 2019 02:39 AM

B says: $A_{true}(x) = x + B_{true}(1)$

A says: $B_{true}(x) = x \cdot A_{true}\left(\frac{3}{4}\right)$

$$\implies B_{true}(x) = x \cdot \left(\frac{3}{4} +B_{true}(1)\right)$$

Edit: As Anthony Lahmann mentioned in the comment, the first equation itself implies

$$B_{true}(1) = \frac{3}{4} + B_{true}(1)$$

which is a contradiction immediately.

April 15, 2019 02:56 AM

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