Intro to Number Patterns S2

Intro to Number Patterns

Determining rules for simple sequences

One way of thinking about this situation is that 4 matchsticks are needed to make a square.

Alternatively - every ADDITIONAL square you see means there are four MORE matchsticks than before.

So the number of matchsticks is always 4 times the number of squares.
Or algebraically, M = 4S​

Consider these matchsticks

Multiple Choice

How many tentacles are there with 3 starfish?

• 7

• 8

• 10

• 15

Multiple Choice

What rule formula can we make to relate tentacles to starfish?

(S = number of starfish, T = number of tentacles in total)

• S = 5T

• ST = 5

• T = S + 5

• T = 5S

Multiple Choice

How many tentacles would there be with 25 starfish?

• 5

• 125

• 30

• 100

Multiple Choice

A cafe charges £2.50 for every coffee. Which rule connects the total cost (P) for the number of coffees ordered (C)?

• P = 2.5C

• P = 2.5 + C

• C = 2.5P

• 2.5 = PC