Basic Algebra Revision

a+a=

• aa

• a²

• 2a

There are p students in 4T1 and q students in 4T2. The total number of students is

• p x q

• p + q

• pq

There are n rows of students. Each row has 4 students. How many students are there altogether?

• 4 x n

• 4n

• 4 + n

• n⁴

Terry has $x. His father gives him $5. How much money does he have now?

• x - 5

• 5x

• 5 + x

• x⁵

There are 30 sweets in a packet. Miss Lim repacks them into n bags. How many sweets are there in each bag?

• $n\div30$

• $\frac{30}{n}$

• $\frac{n}{30}$

• $30-n$

The sum of 2, p and q

• 2pq

• 2+pq

• 2+p+q

• 2 x p x q

One bag has n sweets. Miss Lo has 5 such bags of sweets. She ate 3 sweets. How many sweets does she have left?

•  $n+5-3$  

•  $5n-3$  

•  $3n-5$  

•  $\frac{5+n}{3}$  

Mr Tan is k years old. His wife is 2 years younger. How old is his wife?

•  $2-k$  

•  $2k$  

•  $\frac{k}{2}$  

•  $k-2$  

What is the difference between a and b?

•  $a-b$  

•  $ab$  

•  $b-a$  

•  $\frac{a}{b}$  

Rasita has n followers on IG. Betty has 30 followers fewer. How many followers does Betty have?

•  $30-n$  

•  $\frac{30}{n}$  

•  $n-30$  

•  $\frac{n}{30}$