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- Question
- The sum of first four prime numbers is?
Options- A. 10
- B. 11
- C. 16
- D. 17
- Correct Answer
- 17
ExplanationFirst four prime numbers are 2,3,5,7,
Their sum = (2 + 3 + 5 + 7) = 17. - 1. 392/? ? = 28
Options- A. 144
- B. 196
- C. 24
- D. 48 Discuss
- 2. What least number must be subtracted from 13601 to get a number exactly divisible by 87?
Options- A. 49
- B. 23
- C. 29
- D. 31 Discuss
- 3. Which number should replace both the asterisks in (* /21) x (*/189) = 1?
Options- A. 21
- B. 63
- C. 3969
- D. 147 Discuss
- 4. 80 /? =? / 20
Options- A. 40
- B. 400
- C. 800
- D. 1600 Discuss
- 5. Five dozen toys are packed in a box and 98 boxes are kept in a tempo. How many tempos can lift 29400 toys in one round?
Options- A. 4
- B. 5
- C. 7
- D. 6 Discuss
- 6. The first prime number is?
Options- A. 0
- B. 1
- C. 2
- D. 3 Discuss
- 7. 10 / 11 =110 /?
Options- A. 111
- B. 1100
- C. 121
- D. 100 Discuss
- 8. The largest natural number by which the product of three consecutive even naturals is always divisible, is?
Options- A. 16
- B. 24
- C. 48
- D. 96 Discuss
- 9. In a division sum, the divisor is 12 times the quotient and 5 times the remainder . If the remainder be 48 then the dividend is?
Options- A. 240
- B. 576
- C. 4800
- D. 4848 Discuss
- 10. If a number is multiplied by three-forth of itself. The value thus obtained is 10800. What is that number?
Options- A. 210
- B. 180
- C. 120
- D. 160 Discuss
Number System problems
Search Results
Correct Answer: 196
Explanation:
Let 392/?x = 28
Then ?x = 392/28 =14
? x = 142 = 196
Correct Answer: 29
Explanation:
On dividing 13601 by 86, we get 29 as remainder
? Required number to be subtracted = 29.
Correct Answer: 63
Explanation:
Let (y/21) x (y/189) = 1
Then , y2 = 21 x 189 = 21 x 21 x 9
? y = (21 x 3) = 63 .
Correct Answer: 40
Explanation:
Let 80/y = y/20
Then, y 2 = 80 x 20 = 1600
? y = ?1600 = 40.
Correct Answer: 5
Explanation:
? Five dozen = 5 x 12 = 60
? No of toys can be kept in 1 box = 60
? No of toys can be kept in 98 boxes = 60 x 98 = 5880
? 29400 toys can be lifted by = 29400 / 5880 = 5 tempos
Correct Answer: 2
Explanation:
The first prime number is 2.
Correct Answer: 121
Explanation:
Let 10/11 = 110/N,
Then, 10N = 11 x 110
? N = (11 x 110) /10 = 121.
Correct Answer: 48
Explanation:
Required number is 2 x 4 x 6 = 48.
Correct Answer: 4848
Explanation:
Let quotient = Q and remainder = R
Then, Divisor = 12 Q =5 R
Now, R = 48
? 12Q = 5 x 48
? Q = 20
Dividend = Divisor x Quotient + Remainder
? dividend = ( 20 x 240 + 48 )
= 4848
Correct Answer: 120
Explanation:
Let the number be N
According to the question N x ( N x 3)/4 = 10800
? 3N2 / 4 = 10800
? N2 = (10800 x 4) / 3= 14400
N = ?14400 = 120
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