find the sum of all two digit number which are multiples of 2 or 3
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2
Answer:
answer is 12=3,24=6...... and so on.
Answered by
1
Answe
4905
Step-by-step explanation:
by using arithmetic progression,f
sum of n terms=n (2a+(-1)d)d)/2
we're,
n-no .if terms
a-first term in the series.
d-common diffence between the tems
here,a=10,d= - 1 n= 90
S - 90 (20+(90+1) 1/2
= 90 (20+89) /2
= 90 (109/2
= 4505
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