Amit used a shortcut to add consecutive numbers from 1 to 9. He selected a pair of numbers at a time and added them as shown in the picture below. Thus he wrote, 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 = 4 × 9 = 36 What is the sum of consecutive numbers from 10 to 19? 10 + 11 + 12 + 13 + 14 + 15 + 16 + 17 + 18 + 19 = 5 × _ = _ Workout a way to find the sum of numbers from 20 to 30. 20 + 21 + 22 + 23 + 24 + 25 + 26 + 27 + 28 + 29 + 30 = 5 × + =
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sorry it will take so much time to solve
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Really so sorry
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