exam Maths Puzzle Numerical Ability

Please help..quickly need this for tomorrow......thanking you in advance

Casey is 4 years old and Jordan is 13 years old.
When will Casey be tiwce as old as Jordan?

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exam Other Question

Please help me with the following problem:
If we extablish an identity:
(cos^2 A)/(1 + sin A) would equal which of the following?
1. cos^2 A + cot A cos A
2. 1 + sin A
3. 1 - sin A
4. 1
Thank you, Lennie Why does the Trichotomy Property not apply to all complex numbers?

Thank you