Factors and Coprimes 1/1

1. Find the number of factors of 100.
a. 2
b. 5
c. 7
d. 9


2. Find the sum of the factors of 72
a. 152
b. 195
c. 205
d. 216


3. Find the number of ways of writing 140 as a product of two factors
a. 6
b. 9
c. 10
d. 12


4. Find the number of ways of writing 144 as a product of two 'distinct factors'
a. 5
b. 6
c. 7
d. 8


5. Find the number of ways of writing 144 as a product of two factors'
a. 5
b. 6
c. 7
d. 8


6. Find the number of co-primes to 144 which are less than that of it
a. 2
b. 36
c. 48
d. 56


7. Find the sum of all the co-primes of 144
a. 3456
b. 3168
c. 2276
d. 2256


8. Find the number of ways of writing 60 as a product of two co - primes
a. 1
b. 2
c. 3
d. 4