How many nos. are there between 100 and 200 both inclusive and divisible by 2 or 3?
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Between 100 and 200 first number can be divided by 2 is 100 and the last is 200
and first number diveded by 3 is 102 and the last 198
numbers divisible by 2 is n and numbers divisible by 3 is = m
100 + (n - 1) 2 = 200
2n - 2 = 100
n - 1 = 50 ==> n = 51
and 102 + (m - 1) 3 = 198
34 + m - 1 = 66
17 + m - 1 = 33
m = 17 + 51 = 68
Total of such numbers = 17
and first number diveded by 3 is 102 and the last 198
numbers divisible by 2 is n and numbers divisible by 3 is = m
100 + (n - 1) 2 = 200
2n - 2 = 100
n - 1 = 50 ==> n = 51
and 102 + (m - 1) 3 = 198
34 + m - 1 = 66
17 + m - 1 = 33
m = 17 + 51 = 68
Total of such numbers = 17
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