book Maths Puzzle Numerical Ability

9.2% is equal to one of how many? 11, since 11 x 9 = 99?

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book Other Question

The tens digit of a two digit number is twice the units digit. If the digits are reversed, the new number is 36 less than the original number. Find the number.
a gardener plants his garden with 5550 trees and arranged them so that there is one plant more per row as there are rows then number of trees in a row is ?