How many natural numbers from 10 to 25 are divisible by 4?
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Numbers from divisible by 4 from 10 to 25 are :
12, 16 ....24
a= 12 , d= 16-12=4 , last term = 24
last term = a + ( n-1)d
24=12 + (n-1) 4
24 = 12+ 4n -4
24=8+ 4n
24-8 = 4n
16= 4n
n= 16/4
n= 4
Numbers divisible by 4 from 10 to 25 are 4
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