# All Questions

##### Quoc Tran Anh Le Coodinator

02/03/2019 at 13:19-
Huy Toàn 8A (TL) 02/03/2019 at 13:29
C1: We have : 3x + 4x + 5x = x (3 + 4 + 5)

Replace x = 10 <=> 10 ( 3 + 4 + 5) = 10 . 12 = 120

C2 : 3x + 4x + 5x <=> 3 . 10 + 4 . 10 + 5 . 10 = 30 + 40 + 50 = 120

Quoc Tran Anh Le selected this answer.

##### Quoc Tran Anh Le Coodinator

02/03/2019 at 13:19##### Quoc Tran Anh Le Coodinator

28/02/2019 at 15:14-
Huy Toàn 8A (TL) 01/03/2019 at 04:01
We have

\(\dfrac{2}{8}.\dfrac{5}{7}=256.78125=20000000\)

\(=>1000000000:\left(\dfrac{2}{8}.\dfrac{5}{7}\right)=1000000000:20000000=50\)

The answer is 50

Quoc Tran Anh Le selected this answer. -
Thanh Hải Đặng 16/03/2019 at 05:26
1 000 000 000 =10

^{9}=2^{9}.5^{9}\(\Rightarrow\)1000000000 / (2

^{8}x5^{7})=2*5^{2}=50The answer ís 50

##### Quoc Tran Anh Le Coodinator

28/02/2019 at 15:14-
Kaka Lot 02/03/2019 at 13:33
This is two

##### Quoc Tran Anh Le Coodinator

28/02/2019 at 15:13-
Huy Toàn 8A (TL) 01/03/2019 at 03:54
We have : primes from 20 to 30 are 23,29

=> total : 23 + 29 = 52

The answer í 52

Quoc Tran Anh Le selected this answer.

##### Quoc Tran Anh Le Coodinator

28/02/2019 at 14:44-
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##### Uchiha Sasuke

28/02/2019 at 12:27##### Quoc Tran Anh Le Coodinator

27/02/2019 at 11:14##### Quoc Tran Anh Le Coodinator

27/02/2019 at 11:14## 4727

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