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 Number Play 20 Flashcards |
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A 5-digit palindrome must have its first and last digits as ___. |
Card: 1 / 20 |
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Same digit
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Card: 2 / 20 |
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True or False: The number 495 is the Kaprekar constant for 3-digit numbers. |
Card: 3 / 20 |
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True
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Card: 4 / 20 |
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Fill in the blank: The digit '7' appears ___ times between 1 and 1000. |
Card: 5 / 20 |
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300  |
Card: 6 / 20 |
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What is the total number of 2-digit numbers? |
Card: 7 / 20 |
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90
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Card: 8 / 20 |
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Fill in the blank: A supercell is a number that is larger than all of its ___ numbers. |
Card: 9 / 20 |
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Neighboring 
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Card: 10 / 20 |
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If you start with the number 34 and reverse it to get 43, what is the result when you add them together? |
Card: 11 / 20 |
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Card: 12 / 20 |
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True or False: The number 8 is a palindromic number. |
Card: 13 / 20 |
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False |
Card: 14 / 20 |
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What is the result of subtracting 24,547 from 48,952? |
Card: 15 / 20 |
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24,405 |
Card: 16 / 20 |
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Fill in the blank: The total number of 3-digit numbers is ___. |
Card: 17 / 20 |
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900 |
Card: 18 / 20 |
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What is the total sum of 40 and 50 when there are 19 occurrences of 40 and 6 occurrences of 50? |
Card: 19 / 20 |
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1060 |
Card: 20 / 20 |
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