Question

How many 3 digits numbers are divisible by 7.Find a if 5a+2, 4a-1,a+2 are in A.P

Answer 1

tn=a+(n-1)d
994=105+(n-1)7
889=(n-1)7
127=n-1
n=128
128no are divisible by 7

Answer 2

Answer:

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Step-by-step explanation:

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