Question

Greg goes fishing every day for a week. On the first day he catches seven fish and each

day he catches three more than the previous day. How many fish did he catch in total?

Answer 1

I think the answer is 25

Explanation:

1. 7+3+3+3+3+3+3 becuase a week is seven days and the numbers there is seven ,and you plus the 7 with the remaining six days which are 3 each day,my answer was now 25 .please if you know this answer is wrong please tell everyone the correct one

Answer 2

so first day and so on

7, 10, 13,....

as you can see it's an arithmetic progression

so sum for nth term= n/2 { 2a + (n-1) d}

it's the sum of the 7th term

so

7/2 { 7 ×2 + ( 7-1) 3}

7/2 × 32

7× 16

112 fishes