# Practice Test

 A) Not a prime B) An even prime C) Not an odd number D) None of these

Correct option is A

Explanation :
$111....1(91$ times) $=1+10+102+...$. $+1090=1091-110-1=(107)13-110-1=t13-19,$ where $t=107=(t-19)(t12+t11+.......+t+1)=(107-110-1)(1+t+t2+....+t12)=(1+10+102+....+106)(1+t+t2+......t12)$$âˆ´$ $111....1(91$ times ) is a composite number

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SIMILAR QUESTIONS

Q. Let P(x) be a polynomial , which when divided by x-3 and x-5 leaves remainder 10 and 6 respectively . If the polynomial is divided by (x-3)(x-5) then the remainder is

Q. The product of three consecutive natural numbers is divisible by

Q. The sum of the cubes of three consecutive natural numbers is divisible by

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