When measuring blood pressure is it possible for the diastolic number to be higher than the systolic number?

No because the top number is pressure during the beat (or contraction) and the bottom is the pressure between the beat. You can't have more pressure between the beat than during it

It can't happen..
the first number is the pressure of blood being squeezed into your arteries by the heart. the second number is the static pressure between beats.. it can never be higher than the pumping pressure unless you're a few seconds from death..

You could get a number like that, but you better get to the ER right quick.

Uhh, no... you might wanna see a doctor ASAP

not possible