35 & 49
The multiples of 5 between 30 & 50 which are odd are:
5 x 7 = 35
5 x 9 = 45
So for a ratio of 5 : 7, whatever the 5 is multiplied by the 7 must also be multiplied by:
7 x 7 = 49
7 x 9 = 63
63 is greater than 50, so multiplying 5 and 7 by 7 gives the solution of 35 & 49:
35 : 49 is the same ratio as 5 : 7
10.
30
7
33, 35, 39, 45, 49
The sum of the first 30 consecutive odd numbers is 900.
The sum of all the odd numbers between 1 and 30 (2-28) is 784. If you include 30 the result is 900.
10
There are 7 odd numbers between 16 and 30. To find this, you can subtract the largest odd number less than 30 (29) from the smallest odd number greater than 16 (17), then divide by 2 and add 1. So, (29-17)/2 + 1 = 7 odd numbers between 16 and 30.
You cannot. The sum of 5 odd numbers must be odd. 30 is not odd.You cannot. The sum of 5 odd numbers must be odd. 30 is not odd.You cannot. The sum of 5 odd numbers must be odd. 30 is not odd.You cannot. The sum of 5 odd numbers must be odd. 30 is not odd.
33,35,39,45,49
10.
30
7
The odd numbers between 30 and 40 are: 31 33 35 37 39
Between them they are all the integers from 30 to 50.
35
You cannot. The sum of 5 odd numbers is always odd. 30 is not odd.