Step 1. So we need to add the first 5000 odd numbers from 1-9999.
Step 2. We note that 1+9999=10,0000 and 3+9997=10,000 5+9995=10,000 and so on.
Step 3. So we will have 2500 pairs of these numbers adding to 10,000.
Step 4. Then 2500*10000=25000000.
Step 5. ANSWER: The sum of the first 5000 odd numbers is 25 million.
I hope the above steps were helpful.
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