The numbers on two consecutively numbered lockers have the sum of 151. What are the locker numbers?

Question

 Must finish word problems to move further in online course.

Answer 1

the numbers are consecutive which means in a row. 

Start with your doubles facts to figure out a range of numbers. You need 151.

70 + 70 = 140. 80+80 =160 so that is too high. The numbers must be between 70-79.You also know that your 2 numbers are in a row. 

You know you need 2 addends that equal 11 because you know the last digit ends with a 1. 

so,   5 and 6=11.

75+76= 151

 

Answer 2

Let

n = 1st number

n + 1 = 2nd number

 

n + n + 1 = 151

2n = 150

n = 75 1st number

 

n + 1 = 76 second number

Answer 3

algebraically...

x+(x+1)=151

2x+1=151

2x=151-1

2x=150

x=150/2

x=75

x+1=76

using arithmetic...

151/2=75.5 is the mean of the two number

now subtract 0.5 from 75.5 to get 75

now add 0.5 to 75.5 to get 76

Answer 4

75 and 76. Let me know if you need additional help.