Question

the sum of five consecutive even number is 1580 what is the product of the largest and smallest even number

Answer 1

let first number be x
1=x
2=x+1
3=x+2
4=x+3
5=x+4
1 to 5 for first to fifth number
x+x+1+x+2+x+3+x+4=1580
5x+10=1580
5x=1570
x=314
first number =x=314
second=x+1=315
third=x+2=316
fourth=x+3=317
fifth=x+4=318
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