other Exam Numerical Ability

find the remainder when 0^1+1^2+2^3+3^4................19^20 is divided by 11

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other Other Question

using the digits 1,4,7 exactly once and as many zeroes as you want,you may form a number.What is the difference between the smallest and largest remainder that can be obtained when the number is divided by 11 find the sum of the smallest three prime factors of 6^22-1