Each figure in the sequence shown is composed entirely of 1 x 1 shaded squares. If the pattern is continued, how many 1 x 1 shaded squares will there be altogether in the first 21 figures?.

Of four agents alpha, beta, gamma anddelta, three have to be sent together on amission. if alpha and beta cannot gotogether, beta and gamma cannot go togetherand gamma and delta cannot go together,then which of the following holds? 1. any three agents can be sent.2. alpha, delta and any one out of beta andv gamma can be sent.3. beta, gamma and any one out of alphaand delta can be sent.4. the mission is impossible.

4sentences over a chronicle of a teen killer

The personal identification number that students need to apply for federal student aid