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- Check operation order.
- Cancel common factors.
- Use divisibility/remainder rules where applicable.
Correct Answer: A
Correct Answer: A
Method / Topic: Number System
The answer follows the correct operation order or number rule.
Short Explanation
Detailed Explanation
Correct Answer: A
Method / Topic: Number System
<table cellspacing="0" style="border-collapse:collapse; height:20px; width:85px">
<tbody>
<tr>
<td style="background-color:#c0e6f5; border-bottom:1px solid #44b3e1; border-left:none; border-right:none; border-top:1px solid #44b3e1; height:20px; vertical-align:top; white-space:normal; width:85px"><span style="color:#000000">Trailing zeroes are produced by factors of 10, and factors of 5 are fewer than factors of 2. Count powers of 5: floor(25/5)=5 and floor(25/25)=1. Total=5+1=6. Higher powers contribute nothing. The calculation is checked against the conditions in the
. A useful final check is to substitute the
s involving signs, denominators, amount versus interest, and distance versus speed.</span></td>
</tr>
</tbody>
</table>
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Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
Shortcut used, common trap, and the fastest solving route
- Check operation order.
- Cancel common factors.
- Use divisibility/remainder rules where applicable.
How many trailing zeroes are there in 25 factorial?
Explanation
Correct Answer: A
Method / Topic: Number System
The answer follows the correct operation order or number rule.
Short Explanation
Detailed Explanation
Correct Answer: A
Method / Topic: Number System
<table cellspacing="0" style="border-collapse:collapse; height:20px; width:85px">
<tbody>
<tr>
<td style="background-color:#c0e6f5; border-bottom:1px solid #44b3e1; border-left:none; border-right:none; border-top:1px solid #44b3e1; height:20px; vertical-align:top; white-space:normal; width:85px"><span style="color:#000000">Trailing zeroes are produced by factors of 10, and factors of 5 are fewer than factors of 2. Count powers of 5: floor(25/5)=5 and floor(25/25)=1. Total=5+1=6. Higher powers contribute nothing. The calculation is checked against the conditions in the
. A useful final check is to substitute the
s involving signs, denominators, amount versus interest, and distance versus speed.</span></td>
</tr>
</tbody>
</table>
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