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Q: How do you find the sum of the first 50 odd numbers quickly?

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The first 20 odd numbers are: 13579111315171921232527293133353739.

The average is 10. You will find that the average when adding together the first n odd numbers is always equal to n.

The first 85 odd numbers are: 1 3579111315171921232527293133353739414345474951535557596163656769717375777981838587899193959799101103105107109111113115117119121123125127129131133135137139141143145147149151153155157159161163165167169.

The sum of the first 13 odd numbers is 169.

The sum of the first 153 odd numbers is 23,409.

Related questions

The average is 10. You will find that the average when adding together the first n odd numbers is always equal to n.

The first 20 odd numbers are: 13579111315171921232527293133353739.

The first 100 odd whole numbers are: 13579111315171921232527293133353739414345474951535557596163656769717375777981838587899193959799101103105107109111113115117119121123125127129131133135137139141143145147149151153155157159161163165167169171173175177179181183185187189191193195197199.

The first 85 odd numbers are: 1 3579111315171921232527293133353739414345474951535557596163656769717375777981838587899193959799101103105107109111113115117119121123125127129131133135137139141143145147149151153155157159161163165167169.

The sum of the first 15 odd numbers is 225.

The sum of the first 100 odd numbers is 10,000.

The sum of the first 300 odd numbers is 90,000

The sum of the first 40 odd numbers is 1,600.

The sum of the first 13 odd numbers is 169.

The sum of the first 153 odd numbers is 23,409.

The sum of the first 50 odd numbers is 2,500.

The sum of the first 1,000 odd numbers is 1,000,000.