# Maths number system

Find the number of divisor of 1080 excluding the throuout divisors which r perfect squares.

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What would u like to know ?

Posted on Jan 27, 2008

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## Related Questions:

### WHAT IS A GREATEST COMMON MULTIPLE

Are you sure that is the correct term?
It is usually the greatest common divisor - the number which will divide into two numbers neither being zero, without remainder. For instance the highest common divisor of 12 and 16 is 4.

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### What is a prime number ?

A prime number is a whole number greater than one which has no divisors except one and itself. A composite number is a whole number greater than one that isn't prime, that is, a product of two or more whole numbers. See http://en.wikipedia.org/wiki/Prime_number

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### Can't take apart moulinex juice master

Fortunately, we can tweak the Eratosthenes sieve to count the number of divisors more efficiently and elegantly. And you will see that this technique works not only for number of divisors, but also for generating sum of divisors, totient function, biggest prime divisor, basically all functions that have to do with divisors!

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a prime number is a number that can only be multiplied by itself and 1 - example 3 can only be multiplied by itself and 1.

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You must convert them to improper fractions then multiply the dividend by the reciprocal of the divisor.
In the expression a / b , a is the dividend, b is the divisor.

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On some calculators there is a key marked with K (on the key or around it on the calculator face).
Try entering the divisor then the division key then press K. If that does not work try another order.
On some other calculators you press the operation key twice. Try entering the divisor first then press the division key twice. The next number you enter will be divided by the one enter before pressing the operation key. (divisor).

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### Where is the GCF/GCD button on my TI-85 Plus Silver Edition

There are no such buttons, You'll find the lcm (least common multiple) and gcd (greatest common divisor) functions in the MATH NUM menu. Press MATH, right-arrow, and select the desired function.

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