1
Question
The product of the successor and predecessor of 99 is
(a) 9800
(b) 9900
(c) 1099
(d) 9700
(a) 9800
(b) 9900
(c) 1099
(d) 9700
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Solution
(a) 9800
We have:
Successor of 99 = 99 + 1 = 100
Predecessor of 99 = 99 − 1 = 98
Their product = 100 × 98 = 9800
We have:
Successor of 99 = 99 + 1 = 100
Predecessor of 99 = 99 − 1 = 98
Their product = 100 × 98 = 9800
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