Fill the Pascal row

Exercise and reference answers

Questions

1. Answer

   3

   Question

   Row for index 2 reads 1, 2, 1. What is the middle of the row for index 3?

2. Answer

   1

   Question

   What number begins every row of the triangle?

3. Answer

   7

   Question

   In the expansion of a plus b to the n, the indices in each term sum to what, if n is 7?

Instructions

Work it out and type the number.

Explanation