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#### JAgger1

I've got two sets of numbers:

a: 1 3 4 7 9 11 13 15 16 18 21 22 25 32 33 36 38 39 41 42 43 44 46 48

49 50

b: 2 3 5 8 9 10 13 16 17 18 20 21 29 30 31 32 35 39 40 45 48 49 50 52

54 55

How would I write a formula that would tell me how many numbers match

from each set? Thanks