Algebraic expressions

4 × 4 can be written as 4². Similarly, z × z can be written as

• z².

• z + 2.

• 2z.

• z + z.

Which of the following terms are ALWAYS equal? (i) y² (ii) y × y (iii) y + y

• Only (ii) and (iii) are equal.

• Only (i) and (ii) are equal.

• Only (i) and (iii) are equal.

• All (i), (ii) and (iii) are the equal.

14 more than t

• 14 - t

• t - 14

• t + 14

• 14t

8 times z

• 8 + z

• z + 8z

• z ÷ 8

• 8z

7 divided by r

• 7r

• 7 ÷ r

• r ÷ 7

• 7 - r

Which of the following are equal to h³? i) 3 times h ii) h × h × h

• Both i) and ii)

• Only i)

• Only ii)

• Neither i) nor ii)

What is the value of 3 + t when t = 6?

• 9

• 18

• 36

Let k denote an odd number. What is the expression for the next odd number?

• k + 1

• k + 3

• 3k

• k + 2

Let n denote an even number. What is the expression for the previous even number?

• n

• n + 2

• n − 2

• 2n

Let k denote a whole number. What will be the next whole number?

• k − 1

• k + 1

• k x 2

• k + 2

Answer explanation

k + 1Let us assume k is 100. The next whole number will be 101, which is k + 1.