How many numbers are there less than 2020 and co-prime to both 2 and 5?
Answers
Answered by
6
Answer:
202
Step-by-step explanation:
jis sankhya ke ant mein zero aata hai use sankhya mein hi 2 aur 5 ka bhag ja sakta hai hai
by ap
10,20,30…...................2020
a=10
d=10
An=2020
n=?
a+(n-1)d=An
10+(n-1)10=2020
n=202
Answered by
3
Answer:
By using arithmetic progression
10,20,30,,,,,,,,2020
a=10,d=T2-T1=20-10=10, an= 2020, n=?
a+(n-1)d=an
10+(n-1)10=2020
10+10n-10=2020
20+10n=2020
10n=2020-20
10n=2000
n=200.
Hope it helps u
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