17. Find the total numbers of two digits positive multiple of 7.
Answers
Answered by
1
Answer:
The 2-digit number divisible by 7 is 14, 21, 28, 35……98
The first 2-digit number which is divisible by 7 is 14
The last 2-digit number which is divisible by 7 is 98
The list of 2-digit numbers divisible by 7 are
14, 21, 28, 35……98 which forms an A.P
Consider a formula
T(n) = a + (n – 1)d
Where
a = 14
d = 7
T(n) = 98
98 = 14 + (n – 1)7
84 = 7n – 7
7n = 91
n = 13
∴ There are 13 two – digits number which are divisible by 7.
hope this will work
Answered by
0
Answer:
13 possible numbers of two digits
from 7x2 =14 to 7x14= 98
Step-by-step explanation:
total 13 two digits number
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