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. 469157 * 9999

1691100843
4591100843
4691100843
3691100843

Answer: Option C

Explanation:

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

2. There are four prime numbers written in ascending order. The product of first three is 385 and that of last three is 1001. The last number is:

Answer: Option B

Explanation:

\begin{aligned} \frac{abc}{bcd} = \frac{385}{1001} => \frac{a}{d} = \frac{5}{13} \end{aligned}So d = 13

3. What is the largest 4 digit number exactly divisible by 88

9900
9999
9988
9944

Answer: Option D

Explanation:

Largest 4 digit number is 9999
After doing 9999 ÷ 88 we get remainder 55
Hence largest 4 digit number exactly divisible by 88 = 9999 - 55 = 9944

4. How many terms are there in 2,4,8,16,....,1024

Answer: Option D

Explanation:

It is a GP. with r = 2, ie \begin{aligned} 2^1, 2^2, 2^3... \end{aligned}
If number of terms is n. Then,
\begin{aligned} 2 \times 2^{n-1} = 1024 \end{aligned} =>
\begin{aligned} 2^{n-1} = 512 \end{aligned}
or \begin{aligned} 2 \times 2^{n-1} = 2^9 \end{aligned}
so n-1 = 9 => n = 10

5. 7589 - X = 3434

4155
2321
3155
None of above

Answer: Option A

Tanima Guha 9 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 10 years ago

TOTALLY WRONG ANSWER ..ANSWER IS B OR D
ashish 11 years ago

wat if integer is 7 ans is b
GCC 11 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