Find the sum of all the three digit numbers which are NOT divisible by 7.
Guys tmr is my exam pls help mehh!!!
Answers
Answered by
13
ANSWER:
- The sum = 424214
GIVEN:
- The number should be three digit and not divisible by 7
TO FIND:
- The sum of all three digit that are not divisible by 7
EXPLANATION:
Sum of all three digit that are not divisible by 7 = sum of all 3 digit numbers - sum of all three digit numbers divisible by 7
Three digit numbers = 100, 101, 102,........,999
sum of all 3 digit numbers:
l = 999
d = 1
a = 100
n = 899 + 1
n = 900
Sum of all three numbers divisible by 7:
15 × 7 = 105 which is the smallest three digit number divisible by 7
996/7 gives 2 as a remiander. Hence 994 is the largest three digit number divisible by 7
Series = 105, 112, 119, ........994
l = 994
a = 105
d = 7
n = 127 + 1
n = 128
HENCE THE SUM OF ALL THREE DIGIT NUMBERS NOT DIVISIBLE BY 7 = 424214.
Answered by
1
Answer:
didi
Step-by-step explanation:
i cant because my sister is beside only she will scold me...
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