Between the numbers 600 and 700, which numbers have the digital root : (i) 5 (ii) 7 (iii) 3 Class 8
easyBetween the numbers 600 and 700, which numbers have the digital root : (i) 5 (ii) 7 (iii) 3 Class 8
Question 1.
Between the numbers 600 and 700, which numbers have the digital root : Class 8
(i) 5
(ii) 7
(iii) 3
Solution:
(i) 608, 617, 626, 635, 644, 653, 662, 671, 680, 689 and 698.
(ii) 601, 610, 619, 628, 637, 646, 655, 664, 673, 682, 691.
(iii) 606, 615, 624, 633, 642, 651, 660, 669, 678, 687, 696.
Question 2.
Write the digital roots of any 12 consecutive numbers. What do you observe? Class 8
We saw that the digital root of multiples of 9 is always 9.
Solution:
Digital root of 14 is 1 + 4 = 5; digital root of 15 is 1 + 5 = 6; digital root of 16 = 7, digital root of 17 = 8, digital root of 18 = 9, digital root of 19 = 1 + 9 = 10 = 1 + 0 = 1, digital root of 20 = 2, digital root of 21 = 3, digital root of 22 = 4, digital root of 23 = 5, digital root of 24 = 6, digital root of 25 = 7.