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Neporo4naja [7]
2 years ago
5

A positive number is called $n$-primable if it is divisible by $n$ and each of its digits is a one-digit prime number. How many

3-primable positive integers are there that are less than 1000
Mathematics
1 answer:
boyakko [2]2 years ago
4 0
Single digit primes are 2, 3, 5 and 7. Only 3 is 3-primable
Two digit numbers that are 3-primable are
27, 33, 57, 72, 75
The 3 digit numbers that are 3-primable are
222, 333, 555, 777
225, 252, 522
237, 273, 327, 372, 723, 732
255, 525, 552
357, 375, 537, 573, 735, 753

There are 28 3-primable natural numbers less than 1000
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List the sides of each triangle from shortest to greatest
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Tema [17]

Answer:

28

Step-by-step explanation:

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the mass of the sun is 2 x 10^30kg and the mass of earth is 6 * 10^24 kg. Approximately how many times greater is the mass of th
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Answer:

The mass of sun is 333333.33 times greater than the mass of earth

Step-by-step explanation:

Given as :

The mass of the sun = 2\times 10^{30} kg

The mass of earth =  6\times 10^{24} kg.

Let The mass of sun is x times greater than the mass of earth

i.e The mass of sun = x × The mass of earth

or,  2\times 10^{30} kg =  6\times 10^{24} kg × The mass of earth

Or, x = \dfrac{2\times 10^{30}}{6\times 10^{24}}

Or, x = \dfrac{2\times 10^{6}}{6}

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Hence, The mass of sun is 333333.33 times greater than the mass of earth Answer

6 0
3 years ago
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