0, 1, 2, 3, 10, 11, 12, 13, 20, 21, 22, 23, 30, 31, 32, 33
The first four prime numbers greater than 10 are , 11, 13,17,19 Their mean is (11 + 13 + 17 + 19) / 4 = 15 NB '15' is NOT a prime number.
The list of numbers that are divisible by five is infinite. The first four are: 5, 10, 15, 20 . . .
There are 15 numbers but the first four numbers are always the same so if you are going to try to guess, you should find the first 4 numbers. first 4 r 8293
the sum of the first 15 prime numbers is 328 .
Just multiply 15 by 4 different whole numbers - in this case, by 1, 2, 3, and 4.
19
Four
Four of them.
The first multiples of 15 are 15, 30, 45, 60, 75, and so on. The first multiples of 4 are 4, 8, 12, 16, 20, and so forth. Multiples are numbers that can be divided evenly by another number.
To find the average of all seven numbers, we can use the formula for the average: (sum of all numbers) / (total number of numbers). Given that the average of the first four numbers is 15, the sum of the first four numbers is 15 * 4 = 60. Similarly, the sum of the last three numbers is 8 * 3 = 24. Therefore, the sum of all seven numbers is 60 + 24 = 84. Finally, the average of all seven numbers is 84 / 7 = 12.
67 of them.
x + y = 15 x - y = 7