If the counting numbers are arranged as shown, under which letter will the number 88 appears? THANK YOU.

Question

If the counting numbers are arranged as shown, under which letter will the number 88 appears?  THANK YOU.

A  B  C  D  E
                  1  2  3  4  5
                  6  7  8  9  10
                  11 12 _  _  _
                  _  _  _  _  _
                  _  _  _  _  _

MathMate · Answer

Visualize this as follows: A=1,6,11,16,... B=2,7,12,17,... C=3,8,11,18,... D=4,9,14,19,... E=5,10,15,20,... and the cycle repeats itself. Can you figure out under which letter 88 will fall?