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Please help solve
If
5² + 5³ = 6
6² + 6³ = 9
7² + 7³ = 5
Then 8² + 8³ = ?
Options
A) 7 B) 5 C) 9 D) 4
hi KarishmaChandock
Welcome to the forum.
At the top of the Help Me section it says Read This Before Posting and in that post "We are happy to help! But we don't do your homework for you. "
How about you tell us what you have tried so far? If you've made a good effort I might give you a hint as you may be lacking specific knowledge that would complete the task.
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob
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Please help solve
If
5² + 5³ = 6
6² + 6³ = 9
7² + 7³ = 5Then 8² + 8³ = ?
Options
A) 7 B) 5 C) 9 D) 4
Let me see.
1) 5² + 5³ = 25 + 125 = 150
150 ÷ 25 = 6
2) 6² + 6³ = 36 + 216 = 252
252 ÷ 36 = 7
3) 7² + 7³ = 49 + 343 = 392
392 ÷ 49 = 8
Now, to find 8² + 8³:
4) 8² = 64
5) 8³ = 512
6) 8² + 8³ = 64 + 512 = 576
576 ÷ 64 = 9
My answer is choice C.
Last edited by mathxyz (2024-04-14 15:07:21)
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hi nycguitarguy
This is a talent exam question so I decided I was not going to provide an answer.
I started the same way as you but
3) 7² + 7³ = 49 + 343 = 392
392 ÷ 49 = 8
and the given 'answer' is
7² + 7³ = 5
So this isn't the way to work these out. If you do find an answer, please don't post it for the reason given above.
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob
Offline
hi nycguitarguy
This is a talent exam question so I decided I was not going to provide an answer.
I started the same way as you but
3) 7² + 7³ = 49 + 343 = 392
392 ÷ 49 = 8
and the given 'answer' is
7² + 7³ = 5
So this isn't the way to work these out. If you do find an answer, please don't post it for the reason given above.
Bob
Thanks Bob. I know now for next time. In any case, can you tell me what I did wrong?
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You're correct that the calculation comes to 8. But the problem in post 1 says it has to come to 5. So your arithmetic is good but you haven't decoded the puzzle. It is possible to find a way to get 5. That's what makes it a worthy puzzle.
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob
Offline
You're correct that the calculation comes to 8. But the problem in post 1 says it has to come to 5. So your arithmetic is good but you haven't decoded the puzzle. It is possible to find a way to get 5. That's what makes it a worthy puzzle.
Bob
Thank you, Bob.
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