ZIDS HAVE 4 SPOTS,ZODS HAVE 9 SPOTS.ALTOGETHER SOME ZIDS AND ZODS HAVE 48 SPOTS.

HOW MANY ZIDS ARE THERE?HOW MANY ZODS?

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ianmoth
22 November 2011
This is an easy one to solve you you can have this as a freebie. Suppose there was one Zid. Then if there was 1 zod there'd be 13 spots. 2 Zods, 22 spots. The total would go up by 9 each time. If you keep going you'll miss 48. So it can't be one zid. Try 2 zids. 17 spots, 26, 35 etc. This process will find the answer. If you have a spreadsheet program you could have a computer do the arithmetic for you.
ianmoth
23 November 2011
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