## Age Word Problem

Solve the following problems.

1.) Jeff is 8 years older than Mira. The sum of their ages is 60. What are their ages?

2.) Angie is 12 years younger than Jaime. The sum of their ages is 44. How old is Jaime?

3.) Leo is 7 years older than Karen. In 5 years, the sum of their ages will be 45. How old is Karen?

4.) Arvin is twice as old as Cory. The sum of their ages is 42. What are their ages?

5.) Rashid is four times as old as Soraya. Three years ago, the sum of their ages was 39. How old is Soraya now?

## Number Word Problem

Solve the following problems.

1.) One number is 3 greater than the other number. Their sum is 47. What are the two numbers?

2.) One number is 12 less than the other number. Their sum is 64. What are the two numbers?

3.) One number is twice the other number. Their sum is 84. What are the two numbers?

4.) One number is five times the other number. Their sum is 72. What are the two numbers?

5.) One number is four times the other number. Their difference is 45. What are the two numbers?

## Conversion Practice Exercises

Convert the following to its decimal, fraction or percent form.

1.) Convert 5/8 to decimal.

2.) Convert 20% to fraction.

3.) Convert 0.255 to percent.

4.) Convert 1/4 to decimals.

5.) Convert .05 to fraction.

## Operations on Decimals Exercises – Set 2

This is our second set of exercises on operations on decimals.

Perform the indicated operation.

1.) 1.5 + 0.7
2.) 10.5 + 3.08 + 4.026
3.) 0.8 – 0.2
4.) 8.06 – 3.215
5.) 5.7 – 0.9
6.) .22 × .6
7.) 5.02 × 1.2
8.) 8.1 ÷ 0.009
9.) .63 ÷ 30
10.) .7 ÷ .005

## Multiplication and Division of Fractions Exercises – Set 2

Find the product of the following:

1.) $\dfrac{3}{4} \times \dfrac{5}{8}$

2.) $\dfrac{1}{8} \times \dfrac{3}{4} \times \dfrac{2}{3}$

3.) $2 \dfrac{3}{5} \times \dfrac{2}{3}$

4.) $7 \dfrac{5}{6} \times 1 \dfrac{3}{4}$

5.) $7 \times 2 \dfrac{3}{14}$

6.) $\dfrac{2}{3} \div \dfrac{3}{4}$

7.) $15 \div \dfrac{5}{6}$

8.) $\dfrac{3}{8} \div 4$

9.) $1 \dfrac{2}{3} \div \dfrac{4}{5}$

10.) $7 \dfrac{1}{4} \div \dfrac{1}{8}$

## Subtraction of Fractions Exercises – Set 2

Find the difference of the following:

1.) $\dfrac{9}{11} - \dfrac{7}{11}$

2.) $\dfrac{10}{21} - \dfrac{3}{21}$

3.) $\dfrac{40}{15} - \dfrac{10}{15}$

4.) $9 \dfrac{3}{10} - \dfrac{7}{10}$

5.) $\dfrac{1}{2} - \dfrac{1}{5}$

6.) $7 - \dfrac{3}{5}$

7.) $5 \dfrac{7}{8} - \dfrac{3}{4}$

8.) $9 \dfrac{1}{2} - 7 \dfrac{1}{5}$

9.) $6 \dfrac{1}{5} - 2 \dfrac{3}{4}$

10.) $12 \dfrac{1}{6} - 3 \dfrac{1}{2}$

## Addition of Fractions Exercises – Set 2

Add the following fractions.

1.) $\dfrac{1}{7} + \dfrac{2}{7}$

2.) $\dfrac{1}{12} + \dfrac{5}{12}$

3.) $\dfrac{7}{15} + \dfrac{2}{15} + \dfrac{6}{15}$

4.) $\dfrac{1}{3} + \dfrac{1}{4}$

5.) $\dfrac{2}{9} + \dfrac{1}{3}$

6.) $\dfrac{3}{8} + \dfrac{1}{4}$

7.) $8 \dfrac{2}{3} + \dfrac{3}{2}$

8.) $\dfrac{1}{2} + \dfrac{2}{3} + \dfrac{3}{4}$

9.) $7 \dfrac{2}{7} + 6 \dfrac{3}{14}$

10.) $3 \dfrac{1}{4} + 2 \dfrac{1}{8}$

Answer key and solution:

1.) $\dfrac{3}{7}$

2.) $\dfrac{6}{12} = \dfrac{1}{2}$

3.) $\dfrac{15}{15} = 1$

4.) $\dfrac{7}{12}$

Solution:

## Conversion of Units Part 1: Centimeters, Meters, Kilometers

Converting from one unit to another is one of the skills that you should learn before taking the Civil Service Examinations. It sometimes makes calculations easier and therefore saves time.

In this series, I will discuss the different methods that can be used in converting from one unit to another. I will illustrate several examples such as conversion among centimeters (cm), meters (m) and kilometers (km). Take note that the methods used here can also be used in conversion of other units of measure.

It is important that you memorize some standard conversions such as the following:

1 m = 100 cm

1 km = 1000 m

1 kg = 1000 g

1 ft = 30 cm

1 ft = 12 inches

1 mile = 1.6 km  » Read more

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