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maths p62

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IgoforA

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if it is repeated the formula will be n^r. so this will be 6^3. There are 6 digits and only three will be occupied with the 3 digit out of 4...... Hope this help :good:
 
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hallaballa

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sorry i just lost my internet connection while i was typing
here i explain
first possible digit is only 5 (5000 to 6000)
for the remining 5 only 3 are needed so ans is
1 x 5c3
 
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