What is the next number in the following sequence?
6, 2, 5, 5, 4, 5, 6, 4 (though sometimes 3), 7, ?

(In reply to

Answer by K Sengupta)

The terms of the given sequence are constituted by the number of bars that are darkened in a LCD display of a hand calculator. to show the digits 0, 1, 2, ...., 9.

We know that precisely 6 bars are darkened in the display to show the digit 9.

Consequently, the required missing digit of the given sequence is 6.

*Edited on ***February 16, 2012, 10:29 am**