ICAS Mathematics Number and Algebra

Question 1

A number pattern starts 3, 7, 11, 15, ... What is the 10th term of the pattern?

Accepted Answer

39

Answer

The pattern adds 4 each time, so the 10th term is 3 + 9 × 4 = 39.

Question 2

Which of the following fractions is closest in value to 0.4?

Accepted Answer

2/5

Answer

2/5 equals exactly 0.4, so it is the closest.

Question 3

Mia buys 3 pens and 2 notebooks for $11. A pen costs $1.50. How much does one notebook cost?

Accepted Answer

$3.25

Answer

Three pens cost $4.50, leaving $6.50 for two notebooks, so each notebook is $3.25.

Question 4

If 4n − 7 = 25, what is the value of 2n + 1?

Accepted Answer

17

Answer

Solving gives n = 8, so 2n + 1 = 17.

Question 5

What is the lowest common multiple (LCM) of 6, 8 and 12?

Accepted Answer

24

Answer

24 is the smallest number that 6, 8 and 12 all divide into evenly.

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