Which of the following is closest in value to ?
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Thanks for this one! The trick of factoring everything into powers of 2 and 5 was super clean once I saw it.
Same here — took me a second to spot the 3125 = 5^5 though.
Wait, how do you know to pair up the factors like that? I got stuck trying to multiply 7.5 × 32 first and it got messy.
Try rewriting the decimals as fractions first, it makes the grouping way more obvious.
Yeah don't actually multiply them out, look for perfect squares hiding in the factors.
Got 85 pretty confidently. 605-655 feels about right, maybe even a touch easier if you're comfortable with exponents.
Is there a faster way to estimate this without full prime factorization? I don't want to burn 2 minutes on a question like this.
You could roughly cube-root the magnitude to eliminate the extreme answer choices, then narrow down.
What it tests
Your fluency with the order of operations, fractions, decimals, and basic number sense — the foundation every quant question leans on.
Common trap
Applying the order of operations out of sequence or rounding intermediate values before the final step.