How many three digits are divisible by 7
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The first three digit number which is divisible by 7 is 105 and last three digit number which is divisible by 7 is 994. This is an A.P. in which a = 105, d = 7 and l = 994. Let the number of terms be n . Then tn = 994.
deeepmota:
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a = 105
d = 7
L = 994
=> a + (n-1)d = 994
=> 105 + (n-1)d = 994
=> (n-1)( 7) = 889
=> n - 1 = 127
=> n = 128
There are 128 three digit numbers that are divisible by 7.
d = 7
L = 994
=> a + (n-1)d = 994
=> 105 + (n-1)d = 994
=> (n-1)( 7) = 889
=> n - 1 = 127
=> n = 128
There are 128 three digit numbers that are divisible by 7.
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