Question

Taking the family tree forward, how many members are there in 9th generation of the family?

• A. 64
• B. 128
• C. 256
• D. 512

Answer 1

The correct option is C 256

Starting with 1 member in 1st generation,
2 members in 2nd generation
2x2 = 4 members in third generation
2x4 = 8 members in fourth generation
2x8 = 16 members in fifth generation
2x16 = 32 members in sixth generation
2x32 = 64 members in seventh generation
2x64 = 128 members in eighth generation
Finally, 2x128 = 256 members are there in ninth generation.