Kim built small-sized cars using 42 building blocks. Select the possible number of blocks used per car using the concept of factors.

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Solution

The correct option is B 7
Total building blocks = 42

Let's find the factors of 42.

$1 \times 42 = 42$
$2 \times 21 = 42$
$3 \times 14 = 42$
$6 \times 7 = 42$
$3 \times 14 = 42$

Factors of 42 are- 1, 2, 3, 6, 7, 14, 21 and 42.

So, among the given options, since only 7 is the factor of 42, hence, we can say that 7 blocks are used per car.

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Kim built small-sized cars using 42 building blocks. Select the possible number of blocks used per car using the concept of factors.

The correct option is B 7Total building blocks = 42 Let's find the factors of 42. 1×42=42 2×21=42 3×14=42 6×7=42 3×14=42 Factors of 42 are- 1, 2, 3, 6, 7, 14, 21 and 42. So, among the given options, since only 7 is the factor of 42, hence, we can say that 7 blocks are used per car.