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- Question
What is the remainder when 1523+2323 is divided by 19 ?
Options- A. 4
- B. 3
- C. 1
- D. 0
- Correct Answer
- 0
ExplanationThe remainder on dividing by 19 will be = 0.
- 1. 3131×31-27 =?
Options- A. 961 x 861
- B. 961 x 961
- C. 961 x 2
- D. 29791 Discuss
- 2. The product of a number and its multiplicative inverse is
Options- A. 1
- B. 0
- C. -1
- D. Infinity Discuss
- 3. Find the number of factors of 9321 ?
Options- A. 4
- B. 5
- C. 7
- D. 8 Discuss
- 4. If x is a whole number, then x²(x² - 1) is always divisible by ?
Options- A. 4
- B. 8
- C. 12
- D. None Discuss
- 5. If V = 12R / (r + R) , then R =
Options- A. Vr / (12 - V)
- B. Vr + (V /12 )
- C. V
- D. V / (r - 12 ) Discuss
- 6. Find the next number in the series 2, 3, 4, 8, 9, 10, 11, 16, 17, 18, 19, 20,...
Options- A. 27
- B. 26
- C. 24
- D. 25 Discuss
- 7. Find the next number in the series 141,137,146,130,155,119,...
Options- A. 147
- B. 168
- C. 162
- D. 182 Discuss
- 8. What is the smallest number by which 2880 must be divided in order to make it into a perfect square ?
Options- A. 2
- B. 3
- C. 4
- D. 5 Discuss
- 9. In a triangle ABC, angle 'a' is the smallest one & A+7B = 112. Find the range of value 'c' ?
Options- A. 138 to 164
- B. 125 to 147
- C. 148 to 158
- D. 152 to 164 Discuss
- 10. Which expression is equivalent to i233 ?
Options- A. i
- B. 1
- C. -i
- D. -1 Discuss
Numbers problems
Search Results
Correct Answer: 961 x 961
Explanation:
We know that
= = 961 x 961.
Correct Answer: 1
Explanation:
The mutiplicative inverse of a number is nothing but a reciprocal of a number.
Now, the product of a number and its multiplicative inverse is always equal to 1.
For example :
Let the number be 15
Multiplicative inverse of 15 = 1/15
The product of a number and its multiplicative inverse is = 15 x 1/15 = 1.
Correct Answer: 8
Explanation:
9321 = 3 x 13 x 239 = 31 x 13 1 x 239 1 ; add one to all the powers ie.,
(1+1) x (1+1) x (1+1)= 8 ;
we get eight factors.
Correct Answer: 12
Explanation:
we can do this by trial and error method.
Putting x = 2,we get 2²(2² - 1) = 12.
checking with other integers, the above equation always gives a value which is a multiple of 12,
So, x²(x² - 1) is always divisible by 12.
Correct Answer: Vr / (12 - V)
Explanation:
We have to rearrange the equation to make R the subject.
Start by cross multiplying by (r + R); V (r + R) = 12R
Multiply out the bracket Vr + VR = 12R
Correct Answer: 26
Explanation:
The pattern is three consecutive numbers and then three consecutive numbers missing.Then four consecutive numbers and then four consecutive numbers missing.Then five consecutive numbers and then five consecutive numbers missing.
The next number=20+6=26
Correct Answer: 168
Explanation:
The pattern is -4, +9,-16, +25, -36
The next number=119+49=168
Correct Answer: 5
Explanation:
By trial and error method, we get
2880/3 = 960 is not a perfect square
2880/4 = 720 is not a perfect square
2880/5 = 576 which is perfect square of 24
Hence, 5 is the least number by which 2880 must be divided in order to make it into a perfect square.
Correct Answer: 152 to 164
Explanation:
A+7B=112
it is clear that A = 14, then it becomes A>=B, but A is smallest angle) given
so, range of A is 0.0001 to 13.9999 ( I am taking upto 4 decimal places)
so, range of B becomes 14 to 16 ( after rounding off to 4 decimal places)
so, range of C becomes 152 to 164 ( after rounding off to 4 decimal places)
Correct Answer: i
Explanation:
We know that,
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