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What least number must be subtracted from 427398 so that remaining number is divisible by 15

  • 3
  • 5
  • 7
  • 9

Answer: Option A

Explanation:

On dividing 427398 by 15 we get the remainder 3, so 3 should be subtracted

Similar Questions :

1. 6897 is divisible by

  • 11 only
  • 19 only
  • both 11 and 19
  • neither 11 nor 19

Answer: Option C

2. Simplify 586645 * 9999

  • 5865863355
  • 5665863355
  • 4865863355
  • 4665863355

Answer: Option A

Explanation:

Although it is a simple question, but the trick is to save time in solving this.
Rather than multiplying it we can do as follows:
586645 * (10000 - 1) = 5866450000 - 586645 = 5865863355

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

  • 7
  • 8
  • 9
  • 10

Answer: Option D

Explanation:

It is a GP. with r = 2, ie 21,22,23...


If number of terms is n. Then,
2×2n−1=1024
=>
2n−1=512

or 2×2n−1=29

so n-1 = 9 => n = 10

4. Which of the following is a prime number

  • 9
  • 2
  • 4
  • 8

Answer: Option B

Explanation:

A prime number is a natural number greater than 1 which has no positive divisors other than 1 or itself.
So from above options 2 is that number

5. 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:

  • 9
  • 13
  • 15
  • 12

Answer: Option B

Explanation:

abcbcd=3851001=>ad=513

So d = 13

Read more from - Numbers Questions Answers
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