Question Detail

For the integer n, if nnn is odd, then what is true

n is odd and n*n is even
n*n is odd
n is even
n*n is odd

Answer: Option A

1. Find the unit digit in \begin{aligned}
(544)^{102} + (544)^{103}
\end{aligned}

Answer: Option C

Explanation:

Required digit is = \begin{aligned}
(4)^{102} + (4)^{103} \end{aligned}
as \begin{aligned} (4)^2 \end{aligned} gives unit digit 6 so \begin{aligned} (4)^{102} \end{aligned} unit digit is 6 and \begin{aligned} (4)^{103} \end{aligned} unit digit is, unit digit of \begin{aligned} 6 \times 4 \end{aligned}= 4, so answer will be unit digit of 6 + 4 = 0

2. 469157 * 9999

1691100843
4591100843
4691100843
3691100843

Answer: Option C

Explanation:

469157 * (10000 - 1)
= 4691570000 - 469157
= 4691100843

3. All prime numbers are odd numbers

True
False

Answer: Option B

Explanation:

It is false, 2 is an even number

4. \begin{aligned}
46^2 - (?)^2 = 4398 - 3066
\end{aligned}

Answer: Option D

5. 1307 * 1307 = ?

1608249
1508249
1408249
1708249

Answer: Option D

Explanation:

\begin{aligned}
(a + b)^{2} = (a^2 + b^2 + 2ab)
\end{aligned}
\begin{aligned}
1307^{2} = (1300 + 7)^2 = (1690000 + 49 + 18200)
\end{aligned}

Tanima Guha 8 years ago

ans is not correct.ex:3 is odd,3*3=9 is odd,3*3*3=27 is odd
harshada 9 years ago

For the integer n, if n*n*n is odd, then what is true
n is odd and n*n is even
n*n is odd
n is even
n*n is odd reg this ques.take a s example 5 ie.5*5*5 so ans either will be B or D.
1729 9 years ago

option D is right
KRISHNENDU 9 years ago

TOTALLY WRONG ANSWER ..ANSWER IS B OR D
ashish 10 years ago

wat if integer is 7 ans is b
GCC 10 years ago

Answer is B and D.
Lets say n is 3 odd no.
n*n=3*3=9 which is odd
n*n*n=3*3*3=27 which is also odd