how many two digit number are divided by 7 do it AP
Answers
Answered by
1
Answer:
49,28 are divisible by 7
Answered by
0
Answer:
13
Step-by-step explanation:
The first two digit number divisible by 7 = 14
last two digit number divisible by 7 = 98
so a = 14 and l = 98 where a = first term of A.P. and l = last term of A.P.
so our A.P. formed is 14 , ….. , …., .. , 98
formula for finding the no of terms in A.P =
l = a + (n-1) d
(d means difference between terms = 7)
so now put the values
i.e. 98 = 14 + (n - 1) 7
84 = 7n - 7
91 = 7n
n = 91/7 = 13
Therefore there are 13 two digit numbers divisible by 7
Similar questions