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Earn +20 ptsQ: Smallest 4-digit number whose digits sum up to 15?
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Continue Learning about Math & Arithmetic
What is the smallest two-digits prime number whose digits are also prime themselves?
23
What is the smallest six - digit number whose digits are all odd?
111111
What is the prime number that its digits adds up to the smallest prime number?
The smallest prime number, of course, is 2. The smallest prime number whose digits add up to 2 is, of course, 2. The next-smallest is 11. It is left as an exercise for the reader to determine whether the other numbers whose digits add up to 2 (e.g. 101, 1001, 10001) are prime.
What is the smallest two digit prime number whose digits themselves are prime?
The smallest two-digit prime number whose digits themselves are prime is 23. Both 2 and 3 are prime numbers, and together they form the prime number 23.
What is the smallest whole number that is a multiple of 18 and whose digits can only be 4 or 7?
774774774774
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