JEE Main Important Physics formulas
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215 is a natural number in the number system. 215 in words is written as “Two Hundred Fifteen”. It has a successor, 216, and a predecessor, 214. It is the fifteenth smallest number that comes after 200. The table of 215 will also contain natural numbers since a natural number getting multiplied by another natural number gives a natural number only.
All the numbers starting from 1, like 1 2 3, are natural numbers. Therefore, 215 is also a natural number.
A number is said to be a prime number if it cannot be divided by any number other than 1 and itself. Since 215 can be divided by numbers other than 1 and 215 itself, it is not a prime number.
A number is called a palindromic number if it looks and means the same from either side. Since 215 from the other side is only 512, it is not a palindromic number. An example of a palindromic number is 202, which on the other side is 202, which is the same.
In roman numerals, 215 is written as CCXV.
On adding 215 over and over again, we will get the table of 215.
\begin{array}{ll}
215 \times 1=215 & 215 \\
\hline 215 \times 2=430 & 215+215=430 \\
\hline 215 \times 3=645 & 215+215+215=645 \\
\hline 215 \times 4=860 & 215+215+215+215=860 \\
\hline 215 \times 5=1075 & 215+215+215+215+215=1075 \\
\hline 215 \times 6=1290 & 215+215+215+215+215+215=1290 \\
\hline 215 \times 7=1505 & 215+215+215+215+215+215+215=1505 \\
\hline 215 \times 8=1720 & 215+215+215+215+215+215+215+215=1720 \\
\hline 215 \times 9=1935 & 215+215+215+215+215+215+215+215+215=1935 \\
\hline 215 \times 10=2150 & 215+215+215+215+215+215+215+215+215+215=2150 \\
\hline
\end{array}
Above is the table of 215 shown with respect to the addition of 215 multiple times.
\begin{array}{|lllll|}
\hline 215 & \times & 1 & = & 215 \\
\hline 215 & \times & 2 & = & 430 \\
\hline 215 & \times & 3 & = & 645 \\
\hline 215 & \times & 4 & = & 860 \\
\hline 215 & \times & 5 & = & 1075 \\
\hline 215 & \times & 6 & = & 1290 \\
\hline 215 & \times & 7 & = & 1505 \\
\hline 215 & \times & 8 & = & 1720 \\
\hline 215 & \times & 9 & = & 1935 \\
\hline 215 & \times & 10 &= & 2150 \\
\hline 215 & \times & 11 & = & 2365 \\
\hline 215 & \times & 12 & = & 2580 \\
\hline 215 & \times & 13 & = & 2795 \\
\hline 215 & \times & 14 & = & 3010 \\
\hline 215 & \times & 15 & = & 3225 \\
\hline 215 & \times & 16 & = & 3440 \\
\hline 215 & \times & 17 & = & 3655 \\
\hline 215 & \times & 18 & = & 3870 \\
\hline 215 & \times & 19 & = & 4085 \\
\hline 215 & \times & 20 &= & 4300 \\
\hline
\end{array}
Q1. A man eats 6 eggs per day. How many eggs will he eat in 215 days?
Ans: Number of eggs in 1 day = 6
Number of eggs in 215 days
\\ 215 \times 6 = 1290
Therefore, he will eat a total of 1290 eggs in 215 days.
Q2. If a company pays Rs 215 for 1 day, how much will it pay for 10 days?
Ans: money in 1 day = 215
Money in 10 days
\\215 \times 10 = 2150
Q3. How much is 215 times 215?
Ans: \\215 \times 215 = 46225
Q4. If the distance from A to B is 215 and B to C is also 215 then what is the distance between A to C?
Ans: \\ A \to B = 215
\\ B\to C = 215
\\ A \to C = 2 \times A\to B
\\ A\to C = 2 \times 215 = 430
Q5. If 1 box of toffees contains 215 toffees, how many toffees 5 boxes will have?
Ans: Toffees in 1 box = 215
Toffees in 5 boxes
\\ 215 \times 5 = 1075
For a number to be prime, it should not get completely divided by numbers other than 1 and itself, but 215 gets divided by numbers other than 1 and itself, which is why it is not a prime number.
Yes, they will all be composites because they can all be divided by 215 and that will make them composites.
215 \times 200 = 43000
Multiplication follows the commutative property, which means 215 times 4 will be the same as 4 times 215, which is 860.
If a number on dividing by 2 gives a remainder of 0 then it is an even number, otherwise it is an odd number. Since 215 gives a remainder of 1, it is an odd number.
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