GCE O/L Mathematics (Sri Lanka) · Mathematics

Number, Fractions and Ratio

50 practice questions, each with the answer and an explanation.

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All 50 questions

Evaluate $(10 + 6) (2 - 1) - 4$ .
Find the highest common factor (HCF) of $10$ and $8$ .
Nimal and Kamal share Rs. 2,500 in the ratio $2 : 3$ . How much does Kamal get?
Evaluate $10 + 3 \times 8 - 1$ .
Anu and Nisha share Rs. 1,400 in the ratio $3 : 4$ . How much does Nisha get?
Evaluate $(6 \times 1 0^{4}) \times (3 \times 1 0^{2})$ and give the answer in standard form.
Evaluate $(10 + 3) (4 - 1) - 4$ .
Anu and Nisha share Rs. 7,200 in the ratio $5 : 7$ . How much does Nisha get?
Evaluate $(6 \times 1 0^{3}) \times (5 \times 1 0^{3})$ and give the answer in standard form.
Evaluate $3 \frac{6}{7} + 3 \frac{5}{9}$ and give the answer as an improper fraction or whole number.
Evaluate $(3 + 2) (3 - 1) - 8$ .
Find the lowest common multiple (LCM) of $20$ and $28$ .
Saman and Sunil share Rs. 3,000 in the ratio $5 : 7$ . How much does Sunil get?
Evaluate $(3 \times 1 0^{4}) \times (5 \times 1 0^{3})$ and give the answer in standard form.
Evaluate $(7 + 8) (6 - 1) - 7$ .
The ratio of boys to girls in a class is $3 : 4$ . There are $42$ students altogether. How many girls are there?
Evaluate $(6 \times 1 0^{2}) \times (3 \times 1 0^{4})$ and give the answer in standard form.
Evaluate $10 + 2 \times 6 - 7$ .
Find the highest common factor (HCF) of $35$ and $21$ .
The ratio of boys to girls in a class is $3 : 4$ . There are $70$ students altogether. How many girls are there?
Evaluate $(5 \times 1 0^{3}) \times (5 \times 1 0^{2})$ and give the answer in standard form.
Evaluate $(7 + 2) (5 - 1) - 7$ .
Find the highest common factor (HCF) of $6$ and $8$ .
The ratio of boys to girls in a class is $2 : 5$ . There are $42$ students altogether. How many girls are there?
Evaluate $(6 \times 1 0^{4}) \times (2 \times 1 0^{3})$ and give the answer in standard form.
Evaluate $(12 + 3) (7 - 1) - 8$ .
The ratio of boys to girls in a class is $3 : 5$ . There are $64$ students altogether. How many girls are there?
Evaluate $3 + 4 \times 4 - 6$ .
Find the lowest common multiple (LCM) of $21$ and $49$ .
Anu and Nisha share Rs. 4,800 in the ratio $3 : 5$ . How much does Nisha get?
Evaluate $(6 \times 1 0^{3}) \times (2 \times 1 0^{4})$ and give the answer in standard form.
Evaluate $3 + 5 \times 7 - 3$ .
Evaluate $(4 \times 1 0^{5}) \times (2 \times 1 0^{3})$ and give the answer in standard form.
Evaluate $(3 + 8) (9 - 1) - 2$ .
Ruwan and Dilan share Rs. 1,750 in the ratio $3 : 4$ . How much does Dilan get?
Evaluate $(6 \times 1 0^{3}) \times (2 \times 1 0^{2})$ and give the answer in standard form.
Simplify $\frac{4}{6} \div \frac{1}{3}$ .
Evaluate $(4 + 9) (7 - 1) - 8$ .
Find the highest common factor (HCF) of $10$ and $25$ .
Nimal and Kamal share Rs. 1,600 in the ratio $3 : 5$ . How much does Kamal get?
Evaluate $(2 \times 1 0^{3}) \times (3 \times 1 0^{3})$ and give the answer in standard form.
Evaluate $4 \frac{1}{9} + 2 \frac{6}{7}$ and give the answer as an improper fraction or whole number.
Evaluate $(2 + 2) (3 - 1) - 7$ .
Nimal and Kamal share Rs. 3,200 in the ratio $3 : 5$ . How much does Kamal get?
Evaluate $(5 \times 1 0^{3}) \times (3 \times 1 0^{4})$ and give the answer in standard form.
Simplify $\frac{5}{7} + \frac{3}{8}$ .
Evaluate $(2 + 4) (9 - 1) - 1$ .
Find the lowest common multiple (LCM) of $15$ and $21$ .
The ratio of boys to girls in a class is $5 : 7$ . There are $72$ students altogether. How many girls are there?
Evaluate $(3 \times 1 0^{4}) \times (3 \times 1 0^{2})$ and give the answer in standard form.

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