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What is the sum of first n odd natural numbers? Question-17. Write the unit digit of square of 799. Question- 18. Write 2/3, -4/9, -8/11 in ascending order. Question-19. Represent 3/4 and 8/9 on a number line. Question-20. Solve : 5x – 3 = 3x + 7

Answer»

the the SUM of FIRST n natural numbers can be CALCULATED with n ÷12 5x-3=3x+7 =1



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