who many two digit no. are divided by 7 b/w 1 to 99
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there are 14,21,28... 98 are no. which are divisible by 7
rao6676:
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Heya !!
Numbers which are divisible by 7 between 1 to 99 : 7 , 14 , 21......... 98
AP = 7 , 14 , 21.........98
Here,
First term ( A ) = 7.
Common difference ( D ) = 7
Last term ( Tn ) = 98
Number of terms ( n ) = ?
Tn = 98
a + ( n - 1 ) × d = 98
7 + ( n - 1 ) × 7 = 98
7 + 7n - 7 = 98
7n = 98
n = 98/7
n = 14
Hence,
14 numbers are divisible by 7 between 1 to 99.
Numbers which are divisible by 7 between 1 to 99 : 7 , 14 , 21......... 98
AP = 7 , 14 , 21.........98
Here,
First term ( A ) = 7.
Common difference ( D ) = 7
Last term ( Tn ) = 98
Number of terms ( n ) = ?
Tn = 98
a + ( n - 1 ) × d = 98
7 + ( n - 1 ) × 7 = 98
7 + 7n - 7 = 98
7n = 98
n = 98/7
n = 14
Hence,
14 numbers are divisible by 7 between 1 to 99.
okk
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