Question

How many odd integers beginning with 15 must be taken for their sum to be equal to 975

Answer 1

Answer:

9

Step-by-step explanation:

Odd integers starting with 15 and less than 975 are:-

15

151

153

155

157

159

now, since 975 ends with best possible numbers which can be used to reach to 975 will be numbers ending with 5. These numbers are 15 & 155.

155 + 155 + 155 + 155 + 155 + 155 + 155 + 15 + 15 + 15 = 975

So in total 9 numbers.