The Robe of the Ephod by my son Daniel (10 yrs old)

My son Daniel told me that his Rebbi asked him a question in Parsha Tetzaveh. It says in Chapter 28 Passage 34 regarding the Robe that the Kohen Gadol wore in the Tabernacle that it must have
פַּעֲמֹן זָהָב וְרִמּוֹן, פַּעֲמֹן זָהָב וְרִמּוֹן, עַל-שׁוּלֵי הַמְּעִיל, סָבִיב

a golden bell and a pomegranate, a golden bell and a pomegranate, upon the skirts of the robe round about.

There is a tradition that there were seventy two pairs of bells and pomegranates on the skirt of the robe.His rebbi wanted to know how we can learn this tradition from the passage above. So my son answered with an original (as far as I know)brilliant answer . He said that there are a total of twenty four hebrew letters in the words describing the golden bell and a pomegranate which are mentioned twice in this passage(twelve times two). When you multiply twenty four by three( the three words describing the golden bell and pomegranate) you arrive at the number seventy two.