Patterns AB ABB ABC — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. Which is NOT a pattern?
A) 1 2 3 4 5
B) red blue red blue
C) AAB AAB
D) clap stomp clap stomp
1 2 3 4 5 keeps changing and never repeats, so it is not a pattern.
2. What is missing? sun, moon, ___, moon, sun, moon
A) star
B) sun
C) cloud
D) rain
The rule is sun then moon repeating, so sun fills the empty middle spot.
3. Spot 11 in big, small, big, small is what?
A) small
B) tiny
C) big
D) huge
Spot 11 is odd, so it shows big like all other odd spots in pattern.
4. Spot 12 in clap, stomp, clap, stomp is what?
A) clap
B) jump
C) tap
D) stomp
Spot 12 is even, and even spots always show stomp in this sound pattern.
Part B: Fill in the Blank
Write the correct answer on each line.
1. Spot 10 in A, B, A, B pattern is B.
Spot 10 is even, and even spots in A, B pattern always show letter B.
2. tap, clap, tap, clap, tap, clap
The rule tap then clap repeats, so clap must fill the empty middle spot.
3. Is 1, 1, 2, 3, 5 a pattern? yes or no
The numbers 1, 1, 2, 3, 5 do not repeat any rule, so it is not a pattern.
4. Spot 11 in red, blue, red, blue is red.
Spot 11 is odd, so it shows red like all other odd spots in this pattern.
5. circle, square, circle, square, circle, square
The rule circle then square repeats, so square fills the missing middle spot.