Question

Find the missing terms.
$1,4,3,16,5,36,\underset{–}{},\underset{–}{},9,\underset{–}{}$

Answer 1

$1,4,3,16,5,36,\underset{–}{},\underset{–}{},9,\underset{–}{}$
This is a double sequence, $1^{st}$ sequence is of odd numbers and $2^{nd}$ sequence is squares of even number.
First sequence is $1,3,5,\underset{–}{},9,\dots \to$ Odd Numbers
Second sequence is $4,16,36,\underset{–}{},\underset{–}{},\dots \to$ Square of Even Numbers
First sequence: $1,3,5,7,9,11,\dots$
Second sequence: $4,16,36,64,100,\dots$
Hence, the missing terms are $7,64$ and $100$.
Therefore, $1,4,3,16,5,36,\underset{–}{7},\underset{–}{64},9,\underset{–}{100}$.