If r=0.345, s=(0.345)^2, and t=root(0.345), which of the : GMAT Problem Solving (PS)
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# If r=0.345, s=(0.345)^2, and t=root(0.345), which of the

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Re: If r=0.345, s=(0.345)^2, and t=root(0.345), which of the [#permalink]

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06 May 2012, 08:47
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If $$r=0.345$$, $$s=0.345^2$$, and $$t=\sqrt{0.345}$$, which of the following is the correct ordering of $$r$$, $$s$$, and $$t$$ ?

A. r < s < t
B. r < t < s
C. s < t < r
D. s < r < t
E. t < r < s

If $$x$$ is in the range $$0<x<1$$ then: $$0<x^2<x<\sqrt{x}<1$$.

Consider the simpler example: if $$x=\frac{1}{4}$$ then $$0<\frac{1}{16}<\frac{1}{4}<\frac{1}{2}<1$$.

So, $$s<r<t$$.

[Reveal] Spoiler: OA

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Re: If r=0.345, s=(0.345)^2, and t=root(0.345), which of the [#permalink]

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08 Jun 2015, 13:22
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Re: If r=0.345, s=(0.345)^2, and t=root(0.345), which of the [#permalink]

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10 Jun 2015, 20:24
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Hi All,

This prompt showcases some great Number Property rules that you're likely to face (in some way or another) on the Official GMAT.

Regardless of the actual numbers involved, IF you're dealing with a positive fraction (meaning a value that is greater than 0 and less than 1), then there are some rules to remember...

1) Squaring that fraction will make the result SMALLER
2) Square-rooting that fraction will make the result BIGGER

Here are some additional Number Property rules for NEGATIVE fractions (meaning a value that is less than 0 and greater than -1)....

1) Squaring that fraction will make the result BIGGER (since squaring a negative creates a positive) AND the result will be CLOSER to 0.
2) Cubing that fraction will make the result BIGGER (since the result will be closer to 0).

GMAT assassins aren't born, they're made,
Rich
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Re: If r=0.345, s=(0.345)^2, and t=root(0.345), which of the [#permalink]

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01 Dec 2016, 09:24
Hello from the GMAT Club BumpBot!

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Re: If r=0.345, s=(0.345)^2, and t=root(0.345), which of the [#permalink]

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01 Dec 2016, 10:08
Bunuel wrote:
If $$r=0.345$$, $$s=0.345^2$$, and $$t=\sqrt{0.345}$$, which of the following is the correct ordering of $$r$$, $$s$$, and $$t$$ ?

A. r < s < t
B. r < t < s
C. s < t < r
D. s < r < t
E. t < r < s

Let $$r = 0.36$$ ; $$s = 0.36^2$$ & $$t = \sqrt{0.36}$$

So, $$r = 0.36 , s ≈ 0.13$$ & $$t = 0.60$$

Thus, $$s < r < t = 0.13 < 0.36 < 0.60$$

Hence, answer will be (D) $$s < r < t$$
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Re: If r=0.345, s=(0.345)^2, and t=root(0.345), which of the   [#permalink] 01 Dec 2016, 10:08
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