Simple, fun algebra challenge

Algebra Level 2

A 2 × A 2 × A 2 = ( ( A × A × A × A A × A ÷ 2 ) ÷ 3 ) × C = A × A \frac A2 \times \frac A2 \times \frac A2 = \left(\left(\frac{A \times A \times A \times A}{A \times A} \div 2\right) \div 3\right) \times C= A \times A

Solve for A A .


The answer is 8.

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3 solutions

Tom Engelsman
Sep 20, 2017

The above equation can be simplified into:

A 3 8 = A 2 6 C = A 2 \frac{A^{3}}{8} = \frac{A^{2}}{6} \cdot C = A^2

which C = 6 C = 6 and A 3 8 A 2 = 0 A = 0 , 8. A^3 - 8A^2 = 0 \Rightarrow A= 0,8. But, A = 0 A = 0 leads to division-by-zero (not allowed). So, A = 8 \boxed{A = 8} is the answer.

( A 2 ) ( A 2 ) ( A 2 ) = A A A 3 8 = A 2 A 8 = 1 A = 8 \left( \frac { A }{ 2 } \right) \left( \frac { A }{ 2 } \right) \left( \frac { A }{ 2 } \right) =A\cdot A\\ \frac { { A }^{ 3 } }{ 8 } ={ A }^{ 2 }\\ \frac { A }{ 8 } =1\\ A=8

Solution- So to solve for C we discover that (A(squared)/2)/3 x C= A squared based on that we know that 2 x 3=C as (A(squared)/2)/3 x C= Equals the exact same thing the equation started with. So C=6 Now lets solve for A (A/2)(cubed)= A(squared), whelp the answer is 8!!! as we divide 8 into 2 we get 4. 4(squared)= 8(squared) divided by 4, This occurs with all numbers (check the equation below). So based on that 8 is the only number that has 8/2 (cubed)=8(squared),

equation X= b/f, B(squared)=f(squared) times x(squared), X(squared)=B(squared)/ f (squared) .

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