How many numbers between 1 to 400 are axactly divisible by 7
Answers
Answered by
6
Hey
Here is your answer,
AP = 7,14,21,.......399
A = 7
an = 399
d = -7
An = a + (n-1) d
399 = 7 + (n-1) (-7)
399-7 = -7n +7
392 = -7n + 7
392-7=-7n
385=-7n
n=-385/7
n=-57
N cannot be negative so the answer is 57
Hope it helps you!
Here is your answer,
AP = 7,14,21,.......399
A = 7
an = 399
d = -7
An = a + (n-1) d
399 = 7 + (n-1) (-7)
399-7 = -7n +7
392 = -7n + 7
392-7=-7n
385=-7n
n=-385/7
n=-57
N cannot be negative so the answer is 57
Hope it helps you!
Answered by
4
57 numbers are divided by 7 between 1 and 400
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