iGCSE Mathematics (0580) :E1.3 Calculate with squares, square roots, cubes and cube roots and other powers and roots of numbers. iGCSE Style Questions Paper 2

Question

From the list, write down:

(a) a cube number

(b) a prime number.

▶️ Answer/Explanation

Solution

Ans:

(a) 64 (since 4×4×4 = 64)

(b) 61 (only number divisible by 1 and itself)

Question

Find the lowest common multiple (LCM) of \( 12x^8 \) and \( 8x^{12} \).

▶️ Answer/Explanation

Solution

Ans: \( 24x^{12} \)

1. Find LCM of coefficients: LCM of 12 and 8 is 24

2. For variables, take highest power: \( x^{12} \)

3. Combine them: \( 24x^{12} \)

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