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Question Detail
What least number should be added to 1056, so that the sum is completely divisible by 23
- 4
- 1
- 2
- 3
Answer: Option C
Explanation:
(1056 / 23) gives remainder 21
21 + 2 = 23, So we need to add 2
1. 587 * 999 = ?
- 586411
- 586413
- 486411
- 486413
Answer: Option B
Explanation:
Trick: 587 * (1000 - 1) = 587000 - 587 = 586413
2. 1939392 * 625
- 1212120010
- 1212120000
- 1212120011
- 1212121010
Answer: Option B
Explanation:
Trick: when multiplying with \begin{aligned} 5^n
\end{aligned} then put n zeros to the right of multiplicand and divide the number with \begin{aligned} 2^n
\end{aligned}
So using this we can solve this question in much less
time.
\begin{aligned} 1939392 \times 5^4 = \frac {19393920000}{16} = 1212120000
\end{aligned}
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. 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}
5. All prime numbers are odd numbers
- True
- False
Answer: Option B
Explanation:
It is false, 2 is an even number
Thanks ! Your comment will be approved shortly !
-
binita 9 years ago
What is the largest 4 digit number exactly divisible by 88?
mastguru 9 years ago replied
Hi Binita,
Please refer to answer given here
http://www.mastguru.com/what-i...
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