Free Practice Question

PS · Problem Solving

sub-505

Divisibility/Multiples/Factors

What is the value of $x$ ?

(1) $4^{x+1}+4^x=320$
(2) $x^2=9$

Answer Choices

Correct answer marked below

Statement (1) ALONE is sufficient

Correct

B

Statement (2) ALONE is sufficient

C

BOTH statements TOGETHER are sufficient

D

EACH statement ALONE is sufficient

E

Statements (1) and (2) TOGETHER are NOT sufficient

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What this question tests

What it tests

Your understanding of divisibility rules, least common multiples, and greatest common factors.

Common trap

Forgetting that 1 is not prime and that every integer divides 0.

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What is the value of xxx ?(1) 4x+1+4x=3204^{x+1}+4^x=3204x+1+4x=320(2) x2=9x^2=9x2=9