- A1,59,999
- B1,60,001
- C1,59,997
- D1,60,000
Step-by-Step Solution
Successor = add 1, so . Predecessor = subtract 1, so . (1,60,001 takes as the successor; 1,59,997 takes A as the predecessor.)
Answer: A) 1,59,999
On the cards, A is the successor of 59,999 and B is the predecessor of 1,00,000. What is A + B?
Class 6Whole NumbersWhole Numbers
Key idea: Closure: when an operation 'stays inside' the whole numbers
Adding two whole numbers always gives a whole number — addition is **closed** on whole numbers. Multiplying two whole numbers always gives a whole number — multiplication is **closed** too. But subtraction is **not** closed: 5 − 7 = −2, which is not a whole number. Division is also not closed: 7 ÷ 2 = 3.5, not a whole number. Closure is the property that lets us trust an operation never to take us 'outside' the world of whole numbers.
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