INTERESTING SUMS 
1. 1+3+5 = ? 
2. 1+3+5+7 = ? 
3. 1+3+5+7+9 = ? 
4. 1+3+5+7+9+11 = ? 
5. 1+3+5+7+9+11+13 = ? 
6. 1+3+5+7+9+11+13+15 = ? 
7. 1+3+5+7+9+11+13+15+17 = ? 
8. 1+3+5+7+………+289+291+293+295 = ? 
9. 1+3+5+7+9+11+13+15+17………………+R = ? 
Answers: 
1. 1+3+5 = 9 = 32 
2. 1+3+5+7 = 16 = 42 
3. 1+3+5+7+9 = 25 = 52 
4. 1+3+5+7+9+11 = 36 = 62 
5. 1+3+5+7+9+11+13 = 49 = 72 
6. 1+3+5+7+9+11+13+15 = 64 = 82 
7. 1+3+5+7+9+11+13+15+17 = 81 = 92 
8. 1+3+5+7+………+289+291+293+295 = 21904 =[(295+1) /2]2 
9. 1+3+5+7+9+11+13+15+17………………+R = [(R+1)/2] 2

Interesting sums

  • 1.
    INTERESTING SUMS 1.1+3+5 = ? 2. 1+3+5+7 = ? 3. 1+3+5+7+9 = ? 4. 1+3+5+7+9+11 = ? 5. 1+3+5+7+9+11+13 = ? 6. 1+3+5+7+9+11+13+15 = ? 7. 1+3+5+7+9+11+13+15+17 = ? 8. 1+3+5+7+………+289+291+293+295 = ? 9. 1+3+5+7+9+11+13+15+17………………+R = ? Answers: 1. 1+3+5 = 9 = 32 2. 1+3+5+7 = 16 = 42 3. 1+3+5+7+9 = 25 = 52 4. 1+3+5+7+9+11 = 36 = 62 5. 1+3+5+7+9+11+13 = 49 = 72 6. 1+3+5+7+9+11+13+15 = 64 = 82 7. 1+3+5+7+9+11+13+15+17 = 81 = 92 8. 1+3+5+7+………+289+291+293+295 = 21904 =[(295+1) /2]2 9. 1+3+5+7+9+11+13+15+17………………+R = [(R+1)/2] 2