Exam Maths Puzzle Numerical Ability

let there is a numbeer 121221222122221222221222222...... find the sum of digits till 1234th term

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Exam Other Question

A bag contains 20 yellow balls, 10 green balls, 5 white balls, 8 black balls, and 1 red
ball. How many minimum balls one should pick out so that to make sure the he gets
at least 2 balls of same color.
15 , 9 , 36 , 18 , 61 , 13 , 24 , 18 , 30 , ?