Find the Missing Term in Addition Sequence: 6+5 to 2+1 Pattern

Below is a sequence of exercises.

The sequence adheres to a certain term-to-term rule.

Complete the missing element (?):

$6+5$

$5+4$

$\text{?}+\text{?}$

$3+2$

$2+1$

To solve this problem, we will first identify the pattern in the sequence of additions and find the missing pair that correctly fits this pattern.

The given sequence is:

• $6+5$
• $5+4$
• $? + ?$
• $3+2$
• $2+1$

Notice that in each step, both numbers in the addition pair decrease by 1:

• From $6+5$ to $5+4$, the numbers decrease to $5$ and $4$ respectively.
• The next pair following this decrement pattern would be $4+3$.
• After this, the sequence continues with $3+2$.
• Thus, the missing pair is $4+3$.

Let's verify this with the choices given:

• Choice 4: $4+3$

This matches the decrement pattern established in the sequence.

Therefore, the correct answer is $4+3$.