exam Maths Puzzle Numerical Ability

Solve the problem 20/3n+1 - 4/3n-1 = 3/2.

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exam Other Question

The 5th little [iggy ran all the way at two different rates. First he ran at 8mph for the first third of the trip but soon got tired and slowed down to 5mph for the rest of the two mile trip. Find how many minutes it took the little piggy to get home. What is the slope of the line that passes through (-4, -2) and the origin?