CAIE IGCSE Mathematics Core 1 Number Questions

Practise CAIE IGCSE Number through integers, fractions, percentages, ratio, bounds, time, money, indices and standard-form calculations.

Covered syllabus points

C1.1 Types of number C1.2 Sets C1.3 Powers and roots C1.4 Fractions, decimals and percentages C1.5 Ordering C1.6 The four operations C1.7 Indices I C1.8 Standard form C1.9 Estimation C1.10 Limits of accuracy C1.11 Ratio and proportion C1.12 Rates C1.13 Percentages C1.14 Using a calculator C1.15 Time C1.16 Money

[Maximum number: 4]

$21 \quad \mathscr{E}=\{\mathrm{a}, \mathrm{b}, \mathrm{d}, \mathrm{e}, \mathrm{f}, \mathrm{h}, \mathrm{i}, \mathrm{m}, \mathrm{p}, \mathrm{t}, \mathrm{u}\}$ $X=\{\mathrm{a}, \mathrm{e}, \mathrm{i}, \mathrm{u}\}$ $Y=\{\mathrm{d}, \mathrm{e}, \mathrm{m}, \mathrm{p}, \mathrm{t}, \mathrm{u}\}$

(a)

Use this information to complete the Venn diagram.

Figure for Question (a) — CAIE IGCSE Mathematics Core

[ 2 ]

(b)

List the elements of $X \cap Y$ .

[ 1 ]

e, u

FT their $X\cap Y$ .

(c)

Find $\mathrm{n}\left(X^{\prime}\right)$ .

[ 1 ]

[Maximum number: 2]

(a)

Shade $\frac{2}{9}$ of this shape.

[ 1 ]

(b)

Write $\frac{2}{9}$ as a percentage.

[ 1 ]

[Maximum number: 1]

Sam writes 851000 in standard form as $85.1\times10^4$ .
Explain why $85.1\times10^4$ is not a number in standard form.

In standard form the value is written as $a\times10^n$ where $1\leqslant a<10$ and 85.1 is greater than 10 oe

[Maximum number: 2]

The length, L, of a road is 39700 m, correct to the nearest 50 m.

Complete this statement about the value of L.

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Covered syllabus points

Question 1

Question (a)

Question (b)

Question (c)

Question 2

Question (a)

Question (b)

Question 3

Question 4