Problem 6 · Guess and check smartly · 4 points
Made by AI and not reviewed by a real person.
Two numbers add up to 10. One number is 4 more than the other. What is the bigger number?
- 5
- 7
- 6
- 4
- 8
Show a hint
- Make two groups using 10 counters in all. Rearrange the counters until one group has 4 more than the other.
- Start with 5 counters in each group. Move one counter from one group to the other. How far apart are the groups now?
Show the answer and solution
Answer: B — 7
Start with 5 and 5. Move one counter from one group to the other to get 6 and 4. They add to 10, but they are only 2 apart, so 6 is a tempting wrong answer. Move one more counter from the group of 4 to the group of 6 to get 7 and 3. They add to 10, and 7 is 4 more than 3. The bigger number is 7.