Book Maths Puzzle

find the sum of all 6 digit numbers which when divided with 7 gives the remainder 4 and the numbers which are not divisible by 2

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Book Other Question

the speed of the train while going from A to B is 60km/h
from B to A is 80km/h
find the speed of the train
Find the next number
1,7,12,17,22,?