IIT JEE Practice Question and Answer
8Q: If the HCF of 210 and 55 is expressible in the form of 210 x 5 + 55P, then value of P = ? 1722 05b5cc6c0e4d2b4197774dacb
5b5cc6c0e4d2b4197774dacb- 1-23false
- 227false
- 316false
- 4-19true
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "-19"
Explanation :
Answer: D) -19 Explanation: HCF of 210 and 55 is 5 Now, 210x5 + 55P = 5 => 1050 + 55P = 5 => 55P = -1045 => P = -1045/55 => P = -19.
Q: The original ASCII code used ___________ bits of each byte, reserving that last bit for error checking ? 1633 05b5cc6c0e4d2b4197774dac1
5b5cc6c0e4d2b4197774dac1- 15false
- 26false
- 37true
- 48false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "7"
Explanation :
Answer: C) 7 Explanation:
Q: In a daily morning walk three persons step off together. their steps measure 75 cm, 80 cm and 85 cm respectively. What is the minimum distance each should walk so that thay can cover the distance in complete steps ? 1590 05b5cc6c0e4d2b4197774dabc
5b5cc6c0e4d2b4197774dabc- 1222 m 44 cmfalse
- 2204 mtrue
- 3201 m 21 cmfalse
- 4208 mfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "204 m"
Explanation :
Answer: B) 204 m Explanation: To find the minimum distance, we have to get the LCM of 75, 80, 85 Now, LCM of 75, 80, 85 = 5 x 15 x 16 x 17 = 20400 Hence, the minimum distance each should walk so that thay can cover the distance in complete steps = 20400 cms = 20400/100 = 204 mts.
Q: Two numbers are in the ratio 3 : 7. If 6 be added to each of them, then they are in the ratio 5 : 9. Find the numbers ? 1765 05b5cc6c0e4d2b4197774dab7
5b5cc6c0e4d2b4197774dab7- 111 & 17false
- 27 & 17false
- 39 & 21true
- 413 & 23false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "9 & 21"
Explanation :
Answer: C) 9 & 21 Explanation: Let the two numbers be x and y Given x : y = 3 : 7 .....(1) Now, x+6 : y+6 = 5 : 9 .....(2) From (1), x = 3y/7 From (2), 5y - 9x = 24 => 5y - 9(3y/7) = 24 => y = 21 => From(1), x = 9 Hence, the two numbers be 9 and 21
Q: The mean of 100 observations is 40. It is found that an observation 84 was misread as 48. Then the correct mean is ? 1667 05b5cc6c0e4d2b4197774dab2
5b5cc6c0e4d2b4197774dab2- 140.36true
- 241.24false
- 341.92false
- 442.05false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "40.36"
Explanation :
Answer: A) 40.36 Explanation: Given, mean of 100 observations is 40 => Total of 100 observations = 40 x 100 = 4000 84 is misread as 48 => Difference = 84 - 48 = 36 => Now, new total of 100 observations = 4000 + 36 = 4036 Correct Mean = 4036/100 = 40.36
Q: The construction of Warangal Fort was started by ______ ? 1558 05b5cc6bfe4d2b4197774daad
5b5cc6bfe4d2b4197774daad- 1Beta - IIfalse
- 2Rudratrue
- 3Jayapafalse
- 4Prola - IIfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "Rudra"
Explanation :
Answer: B) Rudra Explanation:
Q: Symbolic logic was discovered by ___________ 4123 15b5cc6bfe4d2b4197774da9c
5b5cc6bfe4d2b4197774da9c- 1Herman Hollerithfalse
- 2Vonn Neumannfalse
- 3George Booletrue
- 4Sun Microsystemfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "George Boole"
Explanation :
Answer: C) George Boole Explanation:
Q: If the LCM and HCF of two numbers are equal, then the numbers must be 17943 05b5cc6bfe4d2b4197774daa1
5b5cc6bfe4d2b4197774daa1- 1Prime Numbersfalse
- 2Composite Numbersfalse
- 3Equaltrue
- 4Co- prime Numbersfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "Equal"
Explanation :
Answer: C) Equal Explanation: If LCM = HCF then, the two numbers are equal.