Semester Exam Prep Maths Grade 7

Mathematical Equivalence

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Given that 2646k is a perfect square, write down the smallest possible value of k.

Jessica has 546 red beads, 910 blue beads and 364 purple beads.

She wants to use the beads to make as many necklaces as possible to sell to raise money for a charity.

She wants to put the same numbers of red, blue and purple beads on each necklace.

What is the greatest number of necklaces that she can make?

The HCF and LCM of 3276 and x are 36 and 9 828 respectively.

Find the smallest possible value of x.

Express 0.64 as a fraction in its simplest form.

Mathematical Equivalence

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A cake which was frozen at -5^oC was removed from the freezer to thaw.

If its temperature rose to 11^oC, find the increase in temperature of the cake.

Arrange the following numbers in ascending order.

• -0.85

• -0.857

• -0.85

• -0.857

• -12/14

Mathematical Equivalence

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