Tell a number which if kept upside down and is increased by 9 gives 1000
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166= on upside down 991+9 =1000
Eshnamohanty:
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The answer is 661.
The digit 6 when turned upside down becomes the number 9. However, the digit 1 when turned upside down remains the same. So, when the number 661 is turned upside down, it becomes 991. When this number is increased by 9 (991 + 9), the answer is 1,000.
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