Given:
A \(\rightarrow\) refers to parents
L \(\rightarrow\) refers to you
F \(\rightarrow\) refers to grand parents
I\(\rightarrow\) refers to elder sister
y \(\rightarrow\)refers to younger brother
M\(\rightarrow\) refer to uncle
Now, Let us arrange the form the eldest to the youngest. 
F \(\rightarrow\) grand parents
A \(\rightarrow\) parents
M \(\rightarrow\) uncle
I \(\rightarrow\) sister
L \(\rightarrow\) you
Y \(\rightarrow\) younger brother
We get, the word is FAMIL Y

i) 9, 11, 13, 15, 17, 19, 23, 25, 27, 29, 31, 33, 37, 39, 41, 43, 45, 47
ii) 29, 31, 37
iii) 1, 4, 9, 16, 25, 36, 49

i) Prime numbers = 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31
Composite numbers = 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 21, 22, 24, 25, 26, 27, 28, 30
ii) Odd numbers = 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31
Even numbers = 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28
iii) Multiplies of 6 = 6, 12, 18, 24, 30,
Multiplies of 4 = 4, 8, 12, 16, 20, 24, 28
Common multiples = 12, 24
LCM = 12
iv) Monday falls on = 7, 14, 21, 28

Now the HCF of 16, 28
16 = 2 \(\times\) 2 \(\times\)2 \(\times\) 2
28 = 2 \(\times\)2 \(\times\) 7
HCF of (16, 28) = 2 \(\times\)2 = 4
Now the HCF of (16 , 28 -16)
16 = 2 \(\times\) 2 \(\times\)2 \(\times\) 2
12 = 2 \(\times\) 2 \(\times\) 3
HCF of (16, 12) = 2 \(\times\) 2 = 4
Therefore HCF of (16, 28) = HCF of (16, 28 - 16).
Hence, HCF of two numbers a and b, a > b, is same as the HCF of a and a – b.