exam Maths Puzzle Numerical Ability

heres the question: An ant crawls the height of a tennis ball can that has exactly enough space to contain 3 tennis balls. Another ant crawls around the lip of the can. Which one covers a longer distance?

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exam Other Question

Please put in correct sequence starting from larger number ending in the smaller number:
I said it was in this order:Is this correct:
1) 0.401
2) 0.4013
3) 0.4030
4) 0.4031
5) 0.40101
6) 0.40303 Why is it called algebra?

Why is algebra useful?

What does an algebra problem look like?

How are algebra problems different?