# jsingh

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## jsingh's Activity

1. jsingh added a post in a topic Mike and Ike’s Trike

I find WitchOfDoubt's answer meaningful here.

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2. jsingh added a post in a topic What’s the least number?

Is this correct?
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3. jsingh added a post in a topic

Palustrius

That was a very nicely analysed answer.
I WAS thinking of 13th game, and I had assumed that player 1 won the FIRST six games.
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4. jsingh added a post in a topic

I didn't understand the question.
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5. jsingh added a post in a topic

why am I getting an HTML sort of tags?
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6. jsingh added a post in a topic

<p> </p>
<p>
</p> <p> </p>
<p> </p>
<p>He can't just not move a muscle. If his speed is defined, then he has to be moving, right?</p>
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<p>Quite simply put, consider it a walkway. They are flat moving belt on which people walk. So the total speed is velocity of belt+velocity of person.<br />
Use simple logic here. Whatever is not defined, initialize with defaults.<br />
The belt is now flat with each step being of 1 unit, and belt is composed of 30 units.<br />
Simply stating<br />
Va=2Vb</p>
<p>If t= time, A covers 20 steps in t, while remaining 10 are covered by belt, to make a total distance travelled =30.</p>
<p>So, Va=2V(belt)<br />
<br />
This means Vb=V(belt)<br />
<br />
Now, in time t1, B covers x steps, while belt also covers x steps since they have the same speed.</p>
<p>To make a total distance of 30 units, x=15.<br />
<br />
So, B must take 15 steps.</p>
<p> </p>
<br />

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7. jsingh added a post in a topic

good question. it took me while to understand what the question actually meant.
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8. jsingh added a post in a topic

9. jsingh added a post in a topic

<p>
</p> <p> </p>
<p> </p>
<p>Yes it is.</p>
<p>Reason:</p>
<p>100! / 50! straightaway removes 25 even numbers and leaves 25 even numbers from 51 to 100.</p>
<p>from these 25, 12 when divided by 2 give odd quotients, and 13 give even quotient.<br />
so that leaves 25 2s and 13 even numbers spaced by 2, (26 to 50)</p>
<p>out of these 13, 7 when divided by 2, give odd quotients, and 6 give even quotient.</p>
<p>so that leaves, 12 2s and 6 even numbers spaced by 2, (14 to 24)</p>
<p>out of these 6, 3 when divided by 2 give odd quotients, and 3 give even quotient.</p>
<p>so that leaves, 6 2s and 3 even numbers spaced by 2 (8,12)</p>
<p>out of these 3, 1 when divided by 2 gives odd quotient, and 2 give even quotient.</p>
<p>so that leaves 3 2s and 2 even numbers spaced by 2 (4,6)</p>
<p> </p>
<p>out of these 2, 1 when divided by 2 gives odd quotient, and 1 gives even quotient.</p>
<p>so that leaves one 2 and one even number, 2.</p>
<p>which finally gives 1.</p>
<p> </p>
<p>So all 2s in denominator get used up giving a final integer answer.</p>
<div> </div>
<p>like 52, 54, 56, 58, 60</p>
<p>/2 26 27 28 29 30</p>
<p> 26 28 30</p>
<p>/2 13 14</p>
<p> </p>
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