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Can Someone Help Me Out With This? - Education - Nairaland

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Can Someone Help Me With This Quantitative Reasoning Question Please. / Can Someone Help Me With This In Within The Next 12 Minutes / Please Someone Help Me Solve This Difficult Math (2) (3) (4)

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Can Someone Help Me Out With This? by Beremx(f): 8:31am On Aug 18, 2020
I have been racking my brain on how to get this. I need help before my brain explodes

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Re: Can Someone Help Me Out With This? by dejt4u(m): 9:10am On Aug 18, 2020
Beremx:
I have been racking my brain on how to get this. I need help before my brain explodes
that's multiplication mod7
Re: Can Someone Help Me Out With This? by dejt4u(m): 9:26am On Aug 18, 2020
Beremx:
I have been racking my brain on how to get this. I need help before my brain explodes
21. 5 0 2 = 5 × 2 = 10 (converting 10 to a mod7 number is 10 - 7 = 3)
Correct answer is 3 (option C)

22. 3 0 6 = 3 × 6 = 12 (converting 12 to a mod7 number is 12 - 7 = 5)
Correct answer is 5 (option E)

23. 6 0 ? = 5, (this 5 is in mod7 which is 7 + 5 = 12)
So, 6 × ? = 12,
? = 12 ÷ 6 = 2
Correct answer is 2 (option B)

24. ? 0 4 = 2, (this 2 is in mod7 which is 7 + 2 = 9)
So, ? × 4 = 9,
? = 9 ÷ 4 = **** (this doesn't work, then we move to higher multiple of mod7. That is, we use 14 instead of 7. If it doesn't work again, then we move to 21, 28, 35, e.t.c)

? 0 4 = 2, (this 2 is in mod7 which is 14 + 2 = 16),
So, ? × 4 = 16,
? = 16 ÷ 4 = 4
Correct answer is 4 (option D)

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Re: Can Someone Help Me Out With This? by Beremx(f): 9:29am On Aug 18, 2020
dejt4u:

21. 5 0 2 = 5 × 2 = 10 (converting 10 to a mod7 number is 10 - 7 = 3)
Correct answer is 3 (option C)

22. 3 0 6 = 3 × 6 = 12 (converting 12 to a mod7 number is 12 - 7 = 5)
Correct answer is 5 (option E)

23. 6 0 ? = 5, (this 5 is in mod7 which is 7 + 5 = 12)
So, 6 × ? = 12,
? = 12 ÷ 6 = 2
Correct answer is 2 (option B)

24. ? 0 4 = 2, (this 2 is in mod7 which is 7 + 2 = 9)
So, ? × 4 = 9,
? = 9 ÷ 4 = **** (this doesn't work, then we move to higher multiple of mod7. That is we use 14 instead of 7. If it doesn't work again, then we move to 21, 28, 35, e.t.c)

? 0 4 = 2, (this 2 is in mod7 which is 14 + 2 = 16),
So, ? × 4 = 16,
? = 16 ÷ 4 = 4
Correct answer is 4 (option D)

= 10 (10 in mod7 is 10 - 7 = 3)
Correct answer is 3 (option C)
God bless you dear. You have relieved me of being shamed. Chai!! cheesy
Thanks

But what does mod7 mean? Is it like base 7?
Re: Can Someone Help Me Out With This? by dejt4u(m): 9:30am On Aug 18, 2020
Beremx:
God bless you dear. You have relieved me of being shamed. Chai!! cheesy
Thanks
lol. You're welcome

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Re: Can Someone Help Me Out With This? by Beremx(f): 9:34am On Aug 18, 2020
dejt4u:
lol. You're welcome
is mod7 the same as base 7?
Re: Can Someone Help Me Out With This? by dejt4u(m): 9:40am On Aug 18, 2020
Beremx:
is mod7 the same as base 7?
No. They are not the same..

Mod7 means that no number can be up to 7. The maximum we can see is 6.

That is;
1 in mod7 is 1
2 in mod7 is 2
3 in mod7 is 3
4 in mod7 is 4
5 in mod7 is 5
6 in mod7 is 6
7 in mod7 is 0
8 in mod7 is 1
9 in mod7 is 2
10 in mod7 is 3
11 in mod7 is 4
12 in mod7 is 5
13 in mod7 is 6
14 in mod7 is 0
15 in mod7 is 1
16 in mod7 is 2
17 in mod7 is 3
18 in mod7 is 4
19 in mod7 is 5
20 in mod7 is 6
21 in mod7 is 0
22 in mod7 is 1
23 in mod7 is 2
e.t.c

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Re: Can Someone Help Me Out With This? by dejt4u(m): 9:41am On Aug 18, 2020
dejt4u:
No. They are not the same..

Mod7 means that no number can be up to 7. The maximum we can see is 6.

That is;
1 in mod7 is 1
2 in mod7 is 2
3 in mod7 is 3
4 in mod7 is 4
5 in mod7 is 5
6 in mod7 is 6
7 in mod7 is 0
8 in mod7 is 1
9 in mod7 is 2
10 in mod7 is 3
11 in mod7 is 4
12 in mod7 is 5
13 in mod7 is 6
14 in mod7 is 0
15 in mod7 is 1
16 in mod7 is 2
17 in mod7 is 3
18 in mod7 is 4
19 in mod7 is 5
20 in mod7 is 6
21 in mod7 is 0
22 in mod7 is 1
23 in mod7 is 2
e.t.c
I hope this helps
Re: Can Someone Help Me Out With This? by Beremx(f): 9:48am On Aug 18, 2020
dejt4u:
No. They are not the same..

Mod7 means that no number can be up to 7. The maximum we can see is 6.

That is;
1 in mod7 is 1
2 in mod7 is 2
3 in mod7 is 3
4 in mod7 is 4
5 in mod7 is 5
6 in mod7 is 6
7 in mod7 is 0
8 in mod7 is 1
9 in mod7 is 2
10 in mod7 is 3
11 in mod7 is 4
12 in mod7 is 5
13 in mod7 is 6
14 in mod7 is 0
15 in mod7 is 1
16 in mod7 is 2
17 in mod7 is 3
18 in mod7 is 4
19 in mod7 is 5
20 in mod7 is 6
21 in mod7 is 0
22 in mod7 is 1
23 in mod7 is 2
e.t.c
Wow!! The quantitative questions was gotten from a common entrance past questions. The mod7 should be for secondary school abi? Please which topic in math does it fall in?
Re: Can Someone Help Me Out With This? by dejt4u(m): 10:00am On Aug 18, 2020
Beremx:
Wow!! The quantitative questions was gotten from a common entrance past questions. The mod7 should be for secondary school abi? Please which topic in math does it fall in?
basic operation I think. I was introduced to this topic in one of my early days in further mathematics class in SS1
Re: Can Someone Help Me Out With This? by Beremx(f): 10:07am On Aug 18, 2020
dejt4u:
basic operation I think. I was introduced to this topic in one of my early days in further mathematics class in SS1
oh okay. This is what someone sat down and told Primary six to solve in Common Entrance? It is well.

Thanks for your timely response. I really do appreciate wink

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