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dinesh19aug
- Senior | Next Rank: 100 Posts
- Posts: 78
- Joined: Thu Feb 21, 2008 9:05 am
- Thanked: 7 times
I got this question on knewton test. It is very good question. Here's the question, that I want to share:
3 + 3 + 3 + 2 × 3^2 + 2 × 3^3 + 2 × 3^4 + 2 × 3^5 + 2 × 3^6 + 2 × 3^7 =???
[spoiler]
Answer is 3^8
Hint: Find the common terms 3+3+3 can be written as 3^2[/spoiler]
3 + 3 + 3 + 2 × 3^2 + 2 × 3^3 + 2 × 3^4 + 2 × 3^5 + 2 × 3^6 + 2 × 3^7 =???
[spoiler]
Answer is 3^8
Hint: Find the common terms 3+3+3 can be written as 3^2[/spoiler]
