Question

find the sum of all three digits number which are divisible by 7
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Answer 1

Refer the pic below ♡

105 is the three digit number which is divisible by 7.

Answer 2

Answer:

70336

Step-by-step explanation:

d=7

a=105

an(last term)=994

an=a+(n-1)d

994=105+(n-1)7

889/7=n-1

n=127+1

n=128

Sn=n/2{2a+(n-1)d}

S128=128/2{2×105+(128-1)7}

S=64(210+889)

S=64×1099

S=70336

hope this helps you and are you from acharyakulam (sajag makhija)