15
3
?
30
6
1 + 6 = 7; 2 + 5 = 7;
3 + 4 = 7
3 pairs of numbers, total = 7
3 * 7 = 21
.. 1 + 2 + 3 + 4 + 5 + 6 = 21
Answers
Answered by
0
Answer:
Please tell the question
Step-by-step explanation:
Similar questions