120
The number is 120.
8:30 AM. The bell rings at 8, at 8:10, 8:20, and 8:30. The buzzer goes off at 8, 8:15 and 8:30. And at about 8:45, I'm going to silence one or both of them by unplugging them....
15 ÷ 8 = 1 with remainder 7 or 1.875
134 ÷ 15 = 8 with remainder 14
120
The number is 120.
x - 15 = - 8 add 15 to both sides: x -15 + 15 = -8 + 15 simplify both sides: x = 7
15 and 5 both go into every multiple of 15 .
Both 15 and 20 can go into 60, as they are both factors of that number.
8:30 AM. The bell rings at 8, at 8:10, 8:20, and 8:30. The buzzer goes off at 8, 8:15 and 8:30. And at about 8:45, I'm going to silence one or both of them by unplugging them....
120/15 = 8
They both go into 90.
They both go into 1440, for example.
15 ÷ 8 = 1 with remainder 7
The answer is 4 over 15, because eight an thirty both go into 2.
11 and 15 both go into 165. 165 is the LCM (Least Common Multiple) of 11 and 15.