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What is predecessor of ( 20 )

Answer and explanation

Correct answer: 19

The predecessor of a whole number is exactly 1 less than that number. Therefore, the predecessor of 20 is \(20-1=19\). Since 18 is 2 less than 20, it is not the predecessor. Exam tip: subtract 1 from the given number to find its predecessor.

Related tags

Number SystemsNumber LinePredecessorWhole NumbersIntegersMathematicsClass 9 Mcq

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