Insert two operators — Make 6 ▢ 5 ▢ 4 equal 34 by choosing the correct pair of signs
Verbal Reasoning
Mathematical Operations
Difficulty: Easy
Choose an option
-
A- and +
-
Bx and +
-
C÷ and x
-
Dx and -
Answer
Correct Answer: x and +
Explanation
Introduction / Context:We must place two operators to obtain a specific target. Try multiplication first since 34 is near 6×5=30.
Given Data / Assumptions:
- Expression: 6 ▢ 5 ▢ 4 = 34.
- Standard precedence applies.
Concept / Approach:Check combinations that can produce a low-30s number.
Step-by-Step Solution:
1) Try “× and +”: 6 × 5 + 4 = 30 + 4 = 34 → works.2) Other pairs quickly fail: 6 − 5 + 4 = 5; ÷ with × gives non-integer or large deviations.Verification / Alternative check:Ensure no other pair yields 34 under standard precedence; they do not.
Why Other Options Are Wrong:
- They do not equal 34.
Common Pitfalls:
- Forgetting that × precedes +; but even left-to-right, “× and +” still yields 34 here.
Final Answer:x and +