WAEC - Mathematics (2009 - No. 4)

Arrange the following numbers in descending orders of magnitude: 22three, 34five, 21six
21six, 22three, 34five,
21six, 34five, 22three
22three, 34five, 21six
34five, 21six, 22three

Explanation

22three, 34five, 21six = (2 x 3)(2 x 3o), (3 x 51) = (4 x 50), (2 x 61) + (1 x 60)

= (6 + 2), (15 + 4), (12 + 1) = 8ten, 29ten, 13ten in descending order

29ten, 13ten, 8ten = 34five, 21six, 22three

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