B) Alfie says that all the digits in odd numbers are odd. Which of the numbers below show that Alfie is not correct?
A: 5634
B: 7931
C: 2977
D: 3130​

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Aquadrilateral has exactly one pair of parallel sides. which name best describes the figure?

Study results indicate that the mean length of time people spend on a bus in a city is between 21.2 min and 24.5 min what is the study margin of the error?