book Maths Puzzle Numerical Ability

6x^4+2x^3-3x^2+20x-22=(3x^2-2x+5)*(_)+(_)

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book Other Question

Show that the sum of any 5 consecutive counting numbers must have a factor of 5 Dr Wright allowed one hour to reach an appointment 50 miles away. After driving 30 miles, she realized that her speed would have to be increased 15 mi/h for the remainder of the tr