5. Study the following pattern:
1+2= 2 X 3 = 3
1+ 2+ 3 = 3x
= 6
>
>
1+ 2+ 3+ 4= -
10
P
By observing the above pattern, find :
(1) The sum of Ist ten numbers.
(ii) The sum of numbers from 50 to 100.
(ii) The sum of even numbers up to 100.
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