Question

Find the number of integers between 1 and 300 which are divisible by 2 or 5.

1) 180

2) 150

3) 220

4) 120

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Answer 1

Answer:

all the numbers are integer and all are divisible by 2 and 5 both

Step-by-step explanation:

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Answer 2

Answer:

numbers which will be divisible by 2 and 5 will also be divisible by 10.

so we will apply our knowlegde about APs (Arithmetic progressions)

first term - 10

Last term - 300

a + (n-1)d = an

10+(n-1)10=300

10 + 10n - 10= 300

10n=300

n=30

Hence there are 30 terms such that they are divisible by both 2 and 5.

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