exam Maths Puzzle Numerical Ability

Express the sum 1x2 + 2x3 + 3x4 + 4x5 + ... + 10x11 in summation notation.

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exam Other Question

Which label describes the following? 2x^2 - 1 = 0

A) Linear equation B) Equation which is not linear C) Expression Convert -60� to radians. express the answer as a multiple of p</font></PRE>