Maths
Maths Puzzle
Numerical Ability
Use the arithematic sequence of numbers 2,4,6,8,10.....to find the sum of the first 20 terms.?
Read Solution (Total 2)
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- 420.... formula 1/2 (n(n+1)/2)
- 8 years agoHelpfull: Yes(0) No(0)
- a+(n-1)d
a=2
d=2
- 8 years agoHelpfull: Yes(0) No(0)
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