(1 + 2 + 3 ...... + 49 + 50 + 49 + 48 .....
+ 3 + 2 + 1) is equal to?
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160
Step-by-step explanation:
1+2=3
3+3=6
6+49=55
55+50=105
185+49=154
154+48=153
153+3=156
156+2+158
158+1=160
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