Question : Directions: Select the option that represents the letters that, when placed from left to right in the blanks below, will complete the letter series.
P _ R R _ P Q _ _ S _ Q R _ S P _ R R S

Option 1: R Q P Q R S Q

Option 2: S Q R R Q P R

Option 3: S Q Q R R P Q

Option 4: Q S R R P R Q

Question : Let $p, q, r$ and $s$ be positive natural numbers having three exact factors including 1 and the number itself. If $q>p$ and both are two-digit numbers, and $r>s$ and both are one-digit numbers, then the value of the expression $\frac{p-q-1}{r-s}$ is:

Option 1: – s –1

Option 2: s – 1

Option 3: 1 – s

Option 4: s + 1

Question : Directions: If R ÷ S means that R is the mother of S, R × S means that R is the father of S and R – S means that R is the sister of S, then which of the following expressions shows that P is the father of R?

Option 1: P × Q ÷ R

Option 2: Q × P – R

Option 3: R × Q – P

Option 4: P × Q – R

Question : Directions: If S – T means that S is the mother of T, S × T means that S is the father of T, and S + T means that S is the sister of T, then which of the following expressions shows that P is the mother of R?

Option 1: Q – P + R

Option 2: P – Q + R

Option 3: P × Q + R

Option 4: R + Q – P