**CHAPTER 4: ALGEBRAIC PROCESSES (1) SIMPLIFICATION AND SUBSTITUTION**

Below are the solution to all the questions in **Exercise 4a** of the **New General Mathematics for Senior Secondary School One (SS 1)**. If there are any question to ask, feel free to ask and a community member will be glad to assist you.

**Note:** Please this should only be used for educational purpose only and should not be seen as a replacement for the New General Mathematics textbook and or every other materials related to it.

**ENSURE YOU ARE ABLE TO VIEW IMAGES ON YOUR DEVICE IN ORDER TO VIEW THE SOLUTIONS.**

**Exercise 4a Questions and Solutions (Number 1 to 10)**

Click Here to view **Exercise 4a Questions and Solutions (Number 11 to 20)**

**Question 1:** A student has 200 naira. If someone gives her 160 naira, how much will she have? If someone gives her x naira, how much will she have?

**Question 2:** A student is 15 years old. How old will he be in 4 years’ time? How old will he be in y years’ time?

**Question 3:** A woman has â‚¦2000. If she spends â‚¦800, how much will she have left? If she spends â‚¦*a* instead, how much will she have left?

**Question 4:** A man was 20 years old 6 years ago. How old is he now? *p* years ago another man was 23 years old. How old is he now?

**Question 5:** A lorry carries 8*t* of blocks

a) If it delivers 3 t, what mass of block is left on the lorry?

b) If it delivers *d* t, what mass remains on the lorry?

**Question 6:** What number is

a) five times as big as 20

b) five times as big as x?

**Question 7:** How many centimeters in

a) 3 metres

b) e metres

**Question 8:** How many hours in

a) 120 min

b) m min

**Question 9:** A sheet of paper has an area of 300cm^{2}.

a) How long is the paper if its breadth is 15cm?

b) How long is the paper if its breadth is *b*cm?

**Question 10:** Express *x* metres and *y*cm in cm

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