Express $49$ as the sum of $7$ odd numbers.

Write a Pythagorean triplet whose one member is $6$.

Write a Pythagorean triplet whose one member is $14$.

Write a Pythagorean triplet whose one member is $16$.

Write a Pythagorean triplet whose one member is $18$.

Find the smallest whole number by which $252$ should be multiplied so as to get a perfect square number. Also find the square root of the square number so obtained.

Find the smallest whole number by which $180$ should be multiplied so as to get a perfect square number. Also, find the square root of the square number so obtained.

Find the smallest whole number by which $1008$ should be multiplied so as to get a perfect square number. Also, find the square root of the square number so obtained.