JSS 1 Mathematics Flashcards: Counting in Twos and Recognising Number Patterns

Question 1

What number comes next: 18, 20, 22, 24, ____?

Accepted Answer

26

Question 2

What number is missing: 46, 48, ____, 52?

Accepted Answer

50

Question 3

Continue the descending pattern: 31, 29, 27, ____?

Accepted Answer

25

Question 4

Starting at 7 and counting forward in twos, what is the fifth number said, including 7?

Accepted Answer

15

Question 5

Starting at 20 and counting backward in twos, what is the sixth number said, including 20?

Accepted Answer

10

Question 6

Which list follows a constant step of 2: 4,6,8,10; 4,6,9,11; 4,8,12,16; or 4,5,6,7?

Accepted Answer

4, 6, 8, 10

Question 7

If 38 bottle tops are placed in pairs, how many pairs are formed?

Accepted Answer

19

Question 8

Seven pairs of socks contain how many socks altogether?

Accepted Answer

14

Question 9

A class forms 16 pairs of pupils. How many pupils are in the pairs?

Accepted Answer

32

Question 10

There are 27 counters. After making as many pairs as possible, how many counters remain unpaired?

Accepted Answer

1

Question 11

Which expression gives the tenth positive even number?

Accepted Answer

2 × 10

Question 12

What is the twentieth positive even number?

Accepted Answer

40

Question 13

Is 84 in the sequence 2, 4, 6, 8, ...?

Accepted Answer

Yes, because 84 is divisible by 2.

Question 14

Which number does NOT belong to the pattern 12, 14, 16, 18, ...: 22, 28, 35 or 40?

Accepted Answer

35

Question 15

What rule describes 5, 7, 9, 11, ...?

Accepted Answer

Add 2 to the previous term.

Question 16

If the first term is 3 and the rule is “add 2”, what is the eighth term?

Accepted Answer

17

Question 17

What is the sum of the next two terms after 26 in the pattern 20, 22, 24, 26, ...?

Accepted Answer

58

Question 18

How many steps of 2 take you from 14 to 30?

Accepted Answer

8

Question 19

A farmer packs 50 eggs in groups of two. How many groups does he make?

Accepted Answer

25

Question 20

The numbers obtained by counting from 2 in twos are called ____.

Accepted Answer

even numbers

Strong work.