How will you rearrange the sum 1 + 2 + . . . + 20?
1 answer:
Notice, ending ends makes it easeier
1+20=21
2+19=21
...
10+11=21
there are 10 pairs of numbers
they add to 21
10 times 21=210
the sum is 210
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Answer:
A. cd4
Step-by-step explanation:
I know this ...... it is false
I think what your asking for is that x=10
