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Resources tagged with Factorials similar to N000ughty Thoughts:

Other tags that relate to N000ughty Thoughts

Manipulating algebraic expressions/formulae. Number theory. Number - generally. Factors and multiples. Inequality/inequalities. Combinatorics. Algorithms. Factorials. Mathematical reasoning & proof. Divisibility.

There are 6 results

Broad Topics > Numbers and the Number System > Factorials

N000ughty Thoughts

Stage: 4 Challenge Level:

How many noughts are at the end of these giant numbers?

Factorial

Stage: 4 Challenge Level:

How many zeros are there at the end of the number which is the product of first hundred positive integers?

Forgotten Number

Stage: 3 Challenge Level:

I have forgotten the number of the combination of the lock on my briefcase. I did have a method for remembering it...

Fac-finding

Stage: 4 Challenge Level:

Lyndon chose this as one of his favourite problems. It is accessible but needs some careful analysis of what is included and what is not. A systematic approach is really helpful.

Powerful Factorial

Stage: 3 Challenge Level:

6! = 6 x 5 x 4 x 3 x 2 x 1. The highest power of 2 that divides exactly into 6! is 4 since (6!) / (2^4 ) = 45. What is the highest power of two that divides exactly into 100!?

Factoring Factorials

Stage: 3 Challenge Level:

Find the highest power of 11 that will divide into 1000! exactly.