in 12 key 5 black keys are appearing so consider x key will appear in 120 keys
120/x = 12/5
solving further,
x= 50
Answer - If the pattern shown continues, 50 black keys appear on a pipe organ with a total of 120 keys!
Answer:
Hope that was helpful for you! Good luck.
Answer:
1638
Step-by-step explanation:
The best way, and the most used way is long multiplication. What you do is multiply parts of you number(like 78x1, and 78x20) and then add them together, not sure if it helps but here are some examples