between 500 and 900.
33. Find the sum of all two-digit numbers
greater than 50 which when divided by 7
leaves remainder 4.
Answers
Answered by
1
Answer:
the sum of all two digit numbers greater than 50 is 60 as when it will be divided with 7 it will remain it will leave the remainder 4
Answered by
1
Answer:
The number should be the form 7n+4
Should be 50<7n+4<100
∴ Numbers are 53,60,…..95
a=53
d=7
n
th
term =a+(n−1)d
⇒53+(n−1)7=95
⇒(n−1)
7=
42
6
⇒n=7
S
n
=
2
n
(2a+(n−1)d)
=
2
7
(2×53+(7−1)7)
=
2
7
[106+42]
=518.
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