find the number of natural numbers between 101 and 999 which are divisible by both 2 and 5
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numbers between 101 and 999 which are divisible by 2 and 5 are
105,110,115,....995
a=105,d=5
tn=995
a+(n-1)d=995
105+(n-1)5=995
(n-1)5=890
n-1=890รท5=178
n=179
105,110,115,....995
a=105,d=5
tn=995
a+(n-1)d=995
105+(n-1)5=995
(n-1)5=890
n-1=890รท5=178
n=179
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