🧩 Riddle
What year comes next in this sequence: 1973 1979 1987 1993 1997 1999
Answer
👉 2003: they are prime years
L3 · math · short
More hard math riddles
Mary was working in a chemistry lab with a mixture of chemicals that was 90% water and weighed 20 po
hard · age 10+
What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1,000?
hard · age 10+
You have the misfortune to own an unreliable clock
hard · age 10+
A car's odometer shows 72927 miles, a palindromic number
hard · age 10+