UASA Mathematics Form 3 (Chapter 1 - 5)

• m = 5, n = 7

• m = 2, n = 5

• m = 12, n = 6

• m = 3, n = 8

All these are true except,

Mathematical Equivalence

ON

2476 correct to 2 significant figures.

• 2000

• 2500

• 2600

• 2480

Round off 0.008025 correct to 2 significant figures.

• 0.0080

• 0.0090

• 0.008030

• 0.00803

• 8063000

• 8063

• 0.008063

• 0.8063

A ream of paper contains 800 sheets of paper. The thickness of one sheet of paper is 9.4 × 10–3 cm.

Given the total thickness of n reams of paper is 225.6 cm, calculate the value of n.

• 18

• 20

• 26

• 30

A property firm bought a piece of land in the shape of a right-angled triangle PQR as shown in the diagram. Calculate the value of PQ, in metres, and state your answer in standard form.