Type the answer

Exercise and reference answers

Questions

1. Answer

   120

   Question

   Bacteria after 2 hours, starting from 30 and doubling hourly

2. Answer

   3

   Question

   How many numbers are inserted between 1 and 256 to make the G.P.

3. Answer

   256

   Question

   Value of r to the fourth when inserting between 1 and 256

4. Answer

   4

   Question

   Smaller of the two numbers with A.M. 10 and G.M. 8

5. Answer

   27

   Question

   Larger number inserted between 3 and 81 to make a G.P.

6. Answer

   25

   Question

   Sum of the first five terms 1, 3, 5, 7, 9

Instructions

Type the number only.

Explanation