Explanation

Given:

- Q is as much younger than R as he is older than T  

  ⇒ R - Q = Q - T  

  ⇒ Rearranged: R + T = 2Q ...(1)

Also given:

- R + T = 50 ...(2)

From (1) and (2):  

2Q = 50 ⇒ Q = 25

Now put Q = 25 into equation:  

R + T = 50  

So, we still don’t know individual values of R or T, but we can find difference between R and Q:

From earlier:  

R - Q = Q - T  

⇒ R - 25 = 25 - T  

⇒ R + T = 50 (same again)

Now solve:  

R - 25 = 25 - T  

Add both sides:  

R - 25 + T = 25  

⇒ R + T = 50 

So we get consistent results.

Now, what is R - Q?  

Let’s find R:  

From earlier:

R - 25 = 25 - T ⇒ R = 50 - T

Now R - Q = R - 25 = (50 - T) - 25 = 25 - T

So unless T is given, we can’t determine exact value of R - Q

Correct Answer: D) Data inadequate 

Explanation

 Plastic (It is not a natural mineral or metal)

Explanation

The coded word for BROKER is RROBEK.

The coding scheme works by splitting the original word into two halves and reversing the order of the letters in each half. 

• SELFLESS has 8 letters.
• It is split into two halves: SELF and LESS.
• Each half is reversed: FLES and SSEL.
• The reversed halves are concatenated in reverse order (second half first, then the first half): SSEFLES.
• The final 'S' from the original word seems to be a minor variation or a typo in the user's provided example, as the pattern perfectly yields SSEFLES. 

Applying this pattern to BROKER (6 letters):

• Split into two halves: BRO and KER.
• Reverse each half: ORB and REK.
• Concatenate the reversed halves in reverse order (second half first, then the first half): REKORB. 

Explanation

Bat can not see and Snake can not hear

ND-5-09--023

Explanation

Let’s rearrange the parts in the order RPSQ:

- (R) Governments all over the world  

- (P) are concerned about the  

- (S) adverse effects of the rise of  

- (Q) the average temperature of planet earth.  

Full Sentence:  

"Governments all over the world are concerned about the adverse effects of the rise of the average temperature of planet Earth."

This is grammatically correct and logically coherent.