If the denominators of the above simplest rational numbers has no prime divisors other than 2 and 5 what do you observe?

Write the denominators of above rational numbers as the product of primes.

What colour do you observe ?

Find the LCM of 10, 11 what do you observe ?

Find the number of positive divisors of 10800 other than 1 and the number itself.

In this picture what changes do you observe?

The sum of two rational numbers is 8 if one of the numbers is -18/5 what is the other

Write three more equivalent fractions of 3/4 and mark them on the number line. What do you observe?

State the converse and contrapositive of each of the following statements: p: A positive integer is prime only if it has no divisors other than 1 and itself.

What is the equivalent rational number for -15/36 with denominator 12.

If A is the set of the divisors of the number 15, B is the set of prime numbers smaller than 10 and C is the set of even numbers smaller than 9, then (A uu C)nnB is the set