Find the number of integers between 60 and 600 which are divisible by 9 or 12
Answers
Answer:
77 integers between 60 and 600 are divisible by 7.
Step-by-step explanation:
This is a problem in AP. The first number is 63 and the last number is 595, both of which are divisible by 7 and lie between 60 and 600.
Tn = a +(n-1)d
595 = 63 + (n-1)*7, or
595–63 = 532 = 7n - 7, or
532+7 = 539 = 7n, or
n = 539/7 = 77.
Answer: This is a problem in AP. The first number is 63 and the last number is 595, both of which are divisible by 7 and lie between 60 and 600.
Tn = a +(n-1)d
595 = 63 + (n-1)*7, or
595–63 = 532 = 7n - 7, or
532+7 = 539 = 7n, or
n = 539/7 = 77.
Answer: 77 integers between 60 and 600 are divisible by 7.
Answer:
Step-by-step explanation:
pick the first num divisible by 9 = 63
last num divisible by 9 & 12 = 594
Tn = a +(n-1)d
Tn = 594
a = 63
594 = 63+(n-1)*9
594 = 63+9n-9
594 = 54+9n
540 = 9n
n = 60
60 integers between 60 and 600 are divisible by 9.
and with 12 try by u r self so that u can understnad the process
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