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प्र: A sales boy is allowed 412 % discount on the total sales made by him plus a bonus of 14% on the sales over Rs.12,000.If his total earnings were Rs.2400, then his total sales(in Rs.) are ? 2031 0

उत्तर : 4. "Rs.50,589.47"
व्याख्या :
Answer: D) Rs.50,589.47 Explanation: Let the total earnings be Rs.x Then 412% of x + 14% of (x-12000) =2400 ⇒92×x100+14×x-12000100=2400 => x=50,589.47

प्र: Determine which of the given conclusions logically follows from the given statements, disregarding commonly known facts. Statements: Some actors are singers. All the singers are dancers. Conclusions:(i) Some actors are dancers.(ii) No singer is an actor. 2031 0

उत्तर : 4. "Only conclusion (i) follows"
व्याख्या :
Answer: D) Only conclusion (i) follows Explanation: Some + All = Some and the common word in two statements is Singers will not be used.

प्र: An individual deposited 20% of 25% of 30% of what he had into his account with a bank. If he deposited Rs.750, how much was he having initially with him before depositing ? 2031 0

उत्तर : 3. "Rs. 50000"
व्याख्या :
Answer: C) Rs. 50000 Explanation: Let 'x' be the amount he had in the bank. => 20/100(25/100(30/100(x))) = 750 x = 750 x 8000/120 = Rs. 50000

प्र: Maths Challenge 2030 0

उत्तर : 4. "40"
व्याख्या :
Answer: D) 40 Explanation: To get a pair of black rings 100 percent certain 27 blue + 17 red + 2 black = 40 rings should be taken out Then only we can get 100 % a pair of black rings.

प्र: A bag contains 3 red balls, 5 yellow balls and 7 pink balls. If one ball is drawn at random from the bag, what is the probability that it is either pink or red? 2030 0

उत्तर : 1. "2/3"
व्याख्या :
Answer: A) 2/3 Explanation: Given number of balls = 3 + 5 + 7 = 15 One ball is drawn randomly = 15C1 probability that it is either pink or red = 7C1 + 3C115C1 = 7 + 315 = 1015 = 23

प्र: 1 Billion Seconds Equals to 2030 0

उत्तर : 4. "31.68 years"
व्याख्या :
Answer: D) 31.68 years Explanation: We know that 1 year = 365.25 days 1 day = 24 hours 1 hour = 60 minutes 1 minute = 60 seconds => 1 Year = 365.25 x 24 x 60 x 60 Seconds But 1 billion seconds = ? 1 Year = 365.25 x 24 x 60 x 60 Seconds ? = 1000000000 Seconds ? = 1000000000365.25 x 24 x 60 x 60 years = 31. 68 years.

प्र: A earns 50% of B's salary, B earns 80% of C's salary. If the total earnings for a month is Rs. 22000, then what is the earning for A ? 2030 0

उत्तर : 1. "Rs. 4000"
व्याख्या :
Answer: A) Rs. 4000 Explanation: Let C's salary be Rs. x Then B's salary = 80x/100 => A's salary = (50/100) * (80x/100) = 40x/100 But given total earnings in a month = 22000 => x + 80x/100 + 40x/100 = 22000 => x + 120x/100 = 22000 => x = 10000 => A's salary = 40 x 10000/100 = Rs. 4000

प्र: In a 48 ltr mixture, the ratio of milk and water is 5:3. How much water should be added in the mixture so as the ratio will become 3:5 ? 2029 0

उत्तर : 3. "32 lit"
व्याख्या :
Answer: C) 32 lit Explanation: Given mixture = 48 lit Milk in it = 48 x 5/8 = 30 lit => Water in it = 48 - 30 = 18 lit Let 'L' lit of water is added to make the ratio as 3:5 => 30/(18+L) = 3/5 => 150 = 54 + 3L => L = 32 lit.

प्र: A sales boy is allowed 412 % discount on the total sales made by him plus a bonus of 14% on the sales over Rs.12,000.If his total earnings were Rs.2400, then his total sales(in Rs.) are ? 2031 0

उत्तर : 4. "Rs.50,589.47"
व्याख्या :
Answer: D) Rs.50,589.47 Explanation: Let the total earnings be Rs.x Then 412% of x + 14% of (x-12000) =2400 ⇒92×x100+14×x-12000100=2400 => x=50,589.47

प्र: Determine which of the given conclusions logically follows from the given statements, disregarding commonly known facts. Statements: Some actors are singers. All the singers are dancers. Conclusions:(i) Some actors are dancers.(ii) No singer is an actor. 2031 0

उत्तर : 4. "Only conclusion (i) follows"
व्याख्या :
Answer: D) Only conclusion (i) follows Explanation: Some + All = Some and the common word in two statements is Singers will not be used.

प्र: An individual deposited 20% of 25% of 30% of what he had into his account with a bank. If he deposited Rs.750, how much was he having initially with him before depositing ? 2031 0

उत्तर : 3. "Rs. 50000"
व्याख्या :
Answer: C) Rs. 50000 Explanation: Let 'x' be the amount he had in the bank. => 20/100(25/100(30/100(x))) = 750 x = 750 x 8000/120 = Rs. 50000

प्र: Maths Challenge 2030 0

उत्तर : 4. "40"
व्याख्या :
Answer: D) 40 Explanation: To get a pair of black rings 100 percent certain 27 blue + 17 red + 2 black = 40 rings should be taken out Then only we can get 100 % a pair of black rings.

प्र: A bag contains 3 red balls, 5 yellow balls and 7 pink balls. If one ball is drawn at random from the bag, what is the probability that it is either pink or red? 2030 0

उत्तर : 1. "2/3"
व्याख्या :
Answer: A) 2/3 Explanation: Given number of balls = 3 + 5 + 7 = 15 One ball is drawn randomly = 15C1 probability that it is either pink or red = 7C1 + 3C115C1 = 7 + 315 = 1015 = 23

प्र: 1 Billion Seconds Equals to 2030 0

प्र: A earns 50% of B's salary, B earns 80% of C's salary. If the total earnings for a month is Rs. 22000, then what is the earning for A ? 2030 0

प्र: In a 48 ltr mixture, the ratio of milk and water is 5:3. How much water should be added in the mixture so as the ratio will become 3:5 ? 2029 0

उत्तर : 3. "32 lit"
व्याख्या :
Answer: C) 32 lit Explanation: Given mixture = 48 lit Milk in it = 48 x 5/8 = 30 lit => Water in it = 48 - 30 = 18 lit Let 'L' lit of water is added to make the ratio as 3:5 => 30/(18+L) = 3/5 => 150 = 54 + 3L => L = 32 lit.

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प्र: A sales boy is allowed 412 % discount on the total sales made by him plus a bonus of 14% on the sales over Rs.12,000.If his total earnings were Rs.2400, then his total sales(in Rs.) are ? 2031 05b5cc783e4d2b4197775021e

उत्तर : 4. "Rs.50,589.47" व्याख्या :Answer: D) Rs.50,589.47 Explanation: Let the total earnings be Rs.x Then 412% of x + 14% of (x-12000) =2400 ⇒92×x100+14×x-12000100=2400 => x=50,589.47

प्र: Determine which of the given conclusions logically follows from the given statements, disregarding commonly known facts. Statements: Some actors are singers. All the singers are dancers. Conclusions:(i) Some actors are dancers.(ii) No singer is an actor. 2031 05b5cc77fe4d2b41977750192

उत्तर : 4. "Only conclusion (i) follows" व्याख्या :Answer: D) Only conclusion (i) follows Explanation: Some + All = Some and the common word in two statements is Singers will not be used.

प्र: An individual deposited 20% of 25% of 30% of what he had into his account with a bank. If he deposited Rs.750, how much was he having initially with him before depositing ? 2031 05b5cc71ee4d2b4197774f595

उत्तर : 3. "Rs. 50000" व्याख्या :Answer: C) Rs. 50000 Explanation: Let 'x' be the amount he had in the bank. => 20/100(25/100(30/100(x))) = 750 x = 750 x 8000/120 = Rs. 50000

प्र: Maths Challenge 2030 05b5cc6d3e4d2b4197774e4c3

उत्तर : 4. "40" व्याख्या :Answer: D) 40 Explanation: To get a pair of black rings 100 percent certain 27 blue + 17 red + 2 black = 40 rings should be taken out Then only we can get 100 % a pair of black rings.

प्र: A bag contains 3 red balls, 5 yellow balls and 7 pink balls. If one ball is drawn at random from the bag, what is the probability that it is either pink or red? 2030 05b5cc6a9e4d2b4197774cef6

उत्तर : 1. "2/3" व्याख्या :Answer: A) 2/3 Explanation: Given number of balls = 3 + 5 + 7 = 15 One ball is drawn randomly = 15C1 probability that it is either pink or red = 7C1 + 3C115C1 = 7 + 315 = 1015 = 23

प्र: 1 Billion Seconds Equals to 2030 05b5cc6afe4d2b4197774d24f

प्र: A earns 50% of B's salary, B earns 80% of C's salary. If the total earnings for a month is Rs. 22000, then what is the earning for A ? 2030 05b5cc6c3e4d2b4197774dc3b

प्र: In a 48 ltr mixture, the ratio of milk and water is 5:3. How much water should be added in the mixture so as the ratio will become 3:5 ? 2029 05b5cc6c2e4d2b4197774dbff

उत्तर : 3. "32 lit" व्याख्या :Answer: C) 32 lit Explanation: Given mixture = 48 lit Milk in it = 48 x 5/8 = 30 lit => Water in it = 48 - 30 = 18 lit Let 'L' lit of water is added to make the ratio as 3:5 => 30/(18+L) = 3/5 => 150 = 54 + 3L => L = 32 lit.

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प्र: A sales boy is allowed 412 % discount on the total sales made by him plus a bonus of 14% on the sales over Rs.12,000.If his total earnings were Rs.2400, then his total sales(in Rs.) are ? 2031 0

उत्तर : 4. "Rs.50,589.47"
व्याख्या :
Answer: D) Rs.50,589.47 Explanation: Let the total earnings be Rs.x Then 412% of x + 14% of (x-12000) =2400 ⇒92×x100+14×x-12000100=2400 => x=50,589.47

प्र: Determine which of the given conclusions logically follows from the given statements, disregarding commonly known facts. Statements: Some actors are singers. All the singers are dancers. Conclusions:(i) Some actors are dancers.(ii) No singer is an actor. 2031 0

उत्तर : 4. "Only conclusion (i) follows"
व्याख्या :
Answer: D) Only conclusion (i) follows Explanation: Some + All = Some and the common word in two statements is Singers will not be used.

प्र: An individual deposited 20% of 25% of 30% of what he had into his account with a bank. If he deposited Rs.750, how much was he having initially with him before depositing ? 2031 0

उत्तर : 3. "Rs. 50000"
व्याख्या :
Answer: C) Rs. 50000 Explanation: Let 'x' be the amount he had in the bank. => 20/100(25/100(30/100(x))) = 750 x = 750 x 8000/120 = Rs. 50000

प्र: Maths Challenge 2030 0

उत्तर : 4. "40"
व्याख्या :
Answer: D) 40 Explanation: To get a pair of black rings 100 percent certain 27 blue + 17 red + 2 black = 40 rings should be taken out Then only we can get 100 % a pair of black rings.

प्र: A bag contains 3 red balls, 5 yellow balls and 7 pink balls. If one ball is drawn at random from the bag, what is the probability that it is either pink or red? 2030 0

उत्तर : 1. "2/3"
व्याख्या :
Answer: A) 2/3 Explanation: Given number of balls = 3 + 5 + 7 = 15 One ball is drawn randomly = 15C1 probability that it is either pink or red = 7C1 + 3C115C1 = 7 + 315 = 1015 = 23

प्र: 1 Billion Seconds Equals to 2030 0

प्र: A earns 50% of B's salary, B earns 80% of C's salary. If the total earnings for a month is Rs. 22000, then what is the earning for A ? 2030 0

प्र: In a 48 ltr mixture, the ratio of milk and water is 5:3. How much water should be added in the mixture so as the ratio will become 3:5 ? 2029 0

उत्तर : 3. "32 lit"
व्याख्या :
Answer: C) 32 lit Explanation: Given mixture = 48 lit Milk in it = 48 x 5/8 = 30 lit => Water in it = 48 - 30 = 18 lit Let 'L' lit of water is added to make the ratio as 3:5 => 30/(18+L) = 3/5 => 150 = 54 + 3L => L = 32 lit.