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I have been racking my brain on how to get this. I need help before my brain explodes

Beremx:
I have been racking my brain on how to get this. I need help before my brain explodes

that's multiplication mod7

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)

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!!
Thanks

But what does mod7 mean? Is it like base 7?

Beremx:
God bless you dear. You have relieved me of being shamed. Chai!!
Thanks

lol. You're welcome

dejt4u:
lol. You're welcome

is mod7 the same as base 7?

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

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

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?

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

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