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Showing 41–44 of 44 questions
The HCF of 36 and 48 is:
Correct Answer:
C. 12
EXPLANATION
36 = 2²×3², 48 = 2⁴×3. HCF = 2²×3 = 12
If log₂ x = 5, then x = ?
Correct Answer:
C. 32
EXPLANATION
log₂ x = 5 means 2⁵ = x, therefore x = 32
What is the sum of angles in a polygon with 8 sides?
Correct Answer:
A. 1080°
EXPLANATION
Sum of interior angles = (n-2)×180° = (8-2)×180° = 6×180° = 1080°
If sin θ = 3/5 and θ is in the second quadrant, find cos θ.
Correct Answer:
A. -4/5
EXPLANATION
In second quadrant, cos is negative. Using sin²θ + cos²θ = 1: cos²θ = 1 - 9/25 = 16/25, so cos θ = -4/5