**21**. If and , find 3u + 2v

**22**. Arrange the following fractions in descending order

**23**. How many lines of symmetry has a square?

A. 0

B. 1

C. 2

D. 4

**24**. If (x, y) → (x, 2y), find the image of under the same mapping.

**25**. The ages in years of eight boys are 14, 14.5, 12, 11.5, 15, 13, 10.5, 13.5. What is their average height?

A. 14

B. 13

C. 12

D. 11

**26**. Convert 133_{five} to a base ten numeral.

A. 23

B. 25

C. 43

D. 40

**27**. Find the simple interest on ¢15,000.00 at a rate of 20% per annum for 5 years.

A. ¢10,000.00

B. ¢15,000.00

C. ¢30,000.00

D. ¢50,000.00

**28**. List all members of the set

{x: 2 < x < 8, x is an integer}

A. {3, 4, 5, 6, 7}

B. {2, 3, 4, 5, 6, 7, 8}

C. {2, 2½, 3, 4, 5, 6, 7, 8}

D. {3, 3½, 4, 4½, 5, 5½, 6, 6½, 7}

**29**. Simplify 348.94 – 188.34

A. 60.60

B. 60.68

C. 160.60

D. 200.60

**30**. Find the difference between the values of (2d)^{2} and 2d^{2}, when d = 3.

A. 16

B. 18

C. 24

D. 28