Question:
Find the sum 3 + 6 + 9 + ...... + 90
A1395
B1935
C1359
D1953
Answer:
A. 1395
Explanation:
3 + 6 + 9 + ..... + 90 = 3(1 + 2 + 3 + ..... + 30) = 3(30×31/2) = 3(15 × 31) = 1395
Related Questions:
Question:
A1395
B1935
C1359
D1953
Answer:
3 + 6 + 9 + ..... + 90 = 3(1 + 2 + 3 + ..... + 30) = 3(30×31/2) = 3(15 × 31) = 1395
Related Questions: