Happy World Metrology Day! Today is a celebration of the signing of the Metre Convention in 1875. The Metre Convention established three international organizations to oversee the keeping of metric standards. It also has absolutely nothing to do with todays puzzle. If you think that you know the answer, please post it in the comments section.

A sphenic number is a positive integer that is the product of three distinct prime numbers. A pronic number is a number that is the product of 2 consecutive non-negative integers. What is the product of the average value of the first 20 sphenic numbers and the average value of the first 20 pronic numbers?

The answer will be posted on Wednesday.

30 42 66 70 78 102 105 110 114 130 138 154 165 170 174 182 186 190 195 222= 2623/ 20 avg1 =131.1500000000

ReplyDelete0 2 6 12 20 30 42 56 72 90 110 132 156 182 210 240 272 306 342 380= 2660/ 20 avg2 =133.0000000000

avg1*avg2=17442.9500000000