Three 3-digit numbers 132, 253 and 374 share a property: the middle digit is the average of the first and last digits (e.g. for 132, 1+3/2 = 2). For the number 5 _ 9 to have this property, what is the missing middle digit?

Question

Accepted Answer

7. Middle digit = average of first and last = 5 + 9/2 = 14/2 = 7. So the middle digit is 7.

Three 3-digit numbers 132, 253 and 374 share a property: the middle digit is the average of the first and last digits (e.g. for 132, $\frac{1 + 3}{2} = 2$ ).
For the number 5 _ 9 to have this property, what is the missing middle digit?

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More Class 6 Place Value and Large Numbers practice

Three 3-digit numbers 132, 253 and 374 share a property: the middle digit is the average of the first and last digits (e.g. for 132, 21+3​=2).For the number 5 _ 9 to have this property, what is the missing middle digit?

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 6 Place Value and Large Numbers practice

Three 3-digit numbers 132, 253 and 374 share a property: the middle digit is the average of the first and last digits (e.g. for 132, $\frac{1 + 3}{2} = 2$ ).
For the number 5 _ 9 to have this property, what is the missing middle digit?