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3 years ago

Which number is a prime number 14,13,21,33 ?

2 answers:

5 0

The answer you are looking for would be B. 13.

Prime numbers are numbers that are not divisible by any numbers except 1 and itself. All even numbers (except 2) are divisible by 2, therefore eliminating 14.
21 and 33 are both divisible by 3 (21/3 = 7 and 33/3 = 11). Thus making 13 the prime number.

I hope this helps!

Levart [38]3 years ago

3 0

A prime number means that the number is only divisible by one and itself.

14 is a multiple of 2 and 7, so 14 wouldn't be it.

21 is a multiple of 3 and 7, so 21 wouldn't be it.

33 is a multiple of 3 and 11, so 33 wouldn't be it.

13 is only divisible by itself because no number can be multiplied to get 13.

So the correct answer is : 13 is the prime number.

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2 years ago

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vichka [17]

Answer:

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Step-by-step explanation:

There are multiple ways of solving this however- since both equations are already in Y-Intercept form, we will use the "Equal Values Method"

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Since we still have a fraction, we shall do it one more time. This time we multiply by 3

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3 years ago

There are 1,348 trays of food at the royal ball. If the trays of food are spread out evenly onto 8 different tables, how many tr

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6 0

3 years ago

Read 2 more answers

What is the seventh term of a sequence whose first term is 1 and whose common ratio is 3?

ikadub [295]

$\bf n^{th}\textit{ term of a geometric sequence}\\\\
a_n=a_1\cdot r^{n-1}\qquad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
r=\textit{common ratio}\\
----------\\
a_1=1\\
r=3\\
n=7
\end{cases}
\\\\\\
a_7=1\cdot 3^{7-1}\implies a_7=1\cdot 3^6\implies a_7=1\cdot 729\implies a_7=729$

7 0

3 years ago