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Class 6 Successor and Predecessor — practice questions with answers

Whole Numbers · 5 sample questions from the school syllabus. Try each one, then open the answer and the worked solution.

1. What is the successor of 7?
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Answer: B) 8
Successor means the number that comes just after. 7 + 1 = 8.
2. If the predecessor of a number is 458, what is the number?
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Answer: B) 459
If predecessor = number - 1 = 458, then number = 458 + 1 = 459.
3. Priya wrote a whole number on the board. She then wrote its successor below it, and its predecessor above it.
What is the difference between the topmost (predecessor) and bottommost (successor) numbers?
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Answer: B) 2
Successor = n + 1, predecessor = n - 1. Difference = (n + 1) - (n - 1) = 2.
4. A number is such that its predecessor is a two-digit number and its successor is a three-digit number.
What is that number?
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Answer: B) 99
We need predecessor (n - 1) to be two-digit and successor (n + 1) to be three-digit. If n = 99, predecessor = 98 (two-digit) and successor = 100 (three-digit). So n = 99.
5. Tara picks a whole number. She finds that the predecessor of its predecessor is the same as the successor of the number 745.
What number did Tara pick?
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Answer: C) 748
Successor of 745 = 746. Let Tara's number be t. Predecessor of predecessor of t = t - 2 = 746, so t = 746 + 2 = 748.
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