# Wk11

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```					                    SPECIAL SERIES
Instructions: Apply suitable logic for solving the following.

1. Find the sum of first 75 natural numbers.

2. Find the sum of 5 + 10 +15 + ... + 250.

3. Find the sum of 15 + 16 + ... + 80.

4. Find 5 + 7 + 9 + ... + 99, using the formula

5. Evaluate: 1 + 4 + 9 + ... + 1600.

6. Find

7. Find

8. Evaluate                                  where k = 50

Math-Drills.com
SPECIAL SERIES
Instructions: Apply suitable logic for solving the following.

1. Find the sum of first 75 natural numbers.

The Sum of n natural number is given by

2. Find the sum of 5 + 10 +15 + ... + 250.

3. Find the sum of 15 + 16 + ... + 80.

4. Find 5 + 7 + 9 + ... + 99, using the formula

Math-Drills.com
5. Evaluate: 1 + 4 + 9 + ... + 1600.

6. Find

7. Find

Given that

8. Evaluate                            where k = 50
Given that

Math-Drills.com

```
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About I am teacher of Accounting and want to build the concepts the students in accounting.