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प्र: Find the odd one out of the following options. 3456 0

उत्तर : 4. "Granite"
व्याख्या :
Answer: D) Granite Explanation: Except Granite all other options belong to the group of precious stones.

प्र: Simplify the following equation [K-L2-K+L2]4K = a/b 1317 0

उत्तर : 2. "bL = -a"
व्याख्या :
Answer: B) bL = -a Explanation: [(K-L)2-K+L2]4K = abK2+L2-2KL-K2+L2+2KL4K= ab => - 4KL/4K = a/b => L = - a/b => bL = -a

प्र: In a pot, there is a mixture of milk and water in the ratio 4 : 5. If it is filled with an additional 8 litres of milk, the pot would be full and ratio of milk and water would become 6 : 5. Find the capacity of the pot ? 9636 0

उत्तर : 2. "22 lit"
व्याख्या :
Answer: B) 22 lit Explanation: Let the capacity of the pot be 'P' litres.Quantity of milk in the mixture before adding milk = 4/9 (P - 8)After adding milk, quantity of milk in the mixture = 6/11 P.6P/11 - 8 = 4/9(P - 8)10P = 792 - 352 => P = 44. The capacity of the pot is 44 liters.

प्र: Amar can do a piece of work in 10 days. He works at it for 4 days and then Arun finishes it in 9 days. In how many days can Amar and Arun together finish the work ? 5871 0

उत्तर : 4. "6 days"
व्याख्या :
Answer: D) 6 days Explanation: 4/10 + 9/x = 1 => x = 15 Then both can do in 1/10 + 1/15 = 1/6 => 6 days

प्र: The average age of a couple is 24 years when they were married five years ago but now the average age of the husband, wife and child is 20 years(the child was born during the interval). What is the present age of the child ? 2039 0

उत्तर : 1. "2 yrs"
व्याख्या :
Answer: A) 2 yrs Explanation: 29 x 2 = 5820 x 3 = 60 ----------- 2 years Therefore, the age of child is 2 years.

प्र: The cost price of an article is 54% of the marked price. Calculate the gain percent after allowing a discount of 15% ? 1642 0

उत्तर : 3. "48.4 %"
व्याख्या :
Answer: C) 48.4 % Explanation: Let marked price = Rs. 100. Then, C.P. = RS. 54, S.P. = Rs. 85Gain % = 31/64 x 100 = 48.4%.

प्र: A train 125 m long passes a man, running at 4 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is: 1669 0

उत्तर : 1. "49 kmph"
व्याख्या :
Answer: A) 49 kmph Explanation: Speed of the train relative to man = (125/10) m/sec = (25/2) m/sec. [(25/2) x (18/5)] km/hr = 45 km/hr. Let the speed of the train be 'x' km/hr. Then, relative speed = (x - 4) km/hr. x - 4 = 45 => x = 49 km/hr.

प्र: At what rate percent on simple interest will Rs.415 amount to Rs.514 in 4 years ? 1429 0

प्र: Find the odd one out of the following options. 3456 05b5cc6d6e4d2b4197774e679

उत्तर : 4. "Granite" व्याख्या :Answer: D) Granite Explanation: Except Granite all other options belong to the group of precious stones.

प्र: Simplify the following equation [K-L2-K+L2]4K = a/b 1317 05b5cc6d6e4d2b4197774e674

उत्तर : 2. "bL = -a" व्याख्या :Answer: B) bL = -a Explanation: [(K-L)2-K+L2]4K = abK2+L2-2KL-K2+L2+2KL4K= ab => - 4KL/4K = a/b => L = - a/b => bL = -a

प्र: In a pot, there is a mixture of milk and water in the ratio 4 : 5. If it is filled with an additional 8 litres of milk, the pot would be full and ratio of milk and water would become 6 : 5. Find the capacity of the pot ? 9636 05b5cc6d6e4d2b4197774e66f

प्र: Amar can do a piece of work in 10 days. He works at it for 4 days and then Arun finishes it in 9 days. In how many days can Amar and Arun together finish the work ? 5871 05b5cc6d6e4d2b4197774e66a

उत्तर : 4. "6 days" व्याख्या :Answer: D) 6 days Explanation: 4/10 + 9/x = 1 => x = 15 Then both can do in 1/10 + 1/15 = 1/6 => 6 days

प्र: The average age of a couple is 24 years when they were married five years ago but now the average age of the husband, wife and child is 20 years(the child was born during the interval). What is the present age of the child ? 2039 05b5cc6d6e4d2b4197774e665

उत्तर : 1. "2 yrs" व्याख्या :Answer: A) 2 yrs Explanation: 29 x 2 = 5820 x 3 = 60 ----------- 2 years Therefore, the age of child is 2 years.

प्र: The cost price of an article is 54% of the marked price. Calculate the gain percent after allowing a discount of 15% ? 1642 05b5cc6d6e4d2b4197774e660

उत्तर : 3. "48.4 %" व्याख्या :Answer: C) 48.4 % Explanation: Let marked price = Rs. 100. Then, C.P. = RS. 54, S.P. = Rs. 85Gain % = 31/64 x 100 = 48.4%.

प्र: A train 125 m long passes a man, running at 4 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is: 1669 05b5cc6d6e4d2b4197774e65b

उत्तर : 1. "49 kmph" व्याख्या :Answer: A) 49 kmph Explanation: Speed of the train relative to man = (125/10) m/sec = (25/2) m/sec. [(25/2) x (18/5)] km/hr = 45 km/hr. Let the speed of the train be 'x' km/hr. Then, relative speed = (x - 4) km/hr. x - 4 = 45 => x = 49 km/hr.

प्र: At what rate percent on simple interest will Rs.415 amount to Rs.514 in 4 years ? 1429 05b5cc6d6e4d2b4197774e656

उत्तर : 2. "5.96 %" व्याख्या :Answer: B) 5.96 % Explanation: Difference in amount = 514 - 415 = 99 99 = (415 x 4 x R)/100 R = 5.96%

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प्र: Find the odd one out of the following options. 3456 0

उत्तर : 4. "Granite"
व्याख्या :
Answer: D) Granite Explanation: Except Granite all other options belong to the group of precious stones.

प्र: Simplify the following equation [K-L2-K+L2]4K = a/b 1317 0

उत्तर : 2. "bL = -a"
व्याख्या :
Answer: B) bL = -a Explanation: [(K-L)2-K+L2]4K = abK2+L2-2KL-K2+L2+2KL4K= ab => - 4KL/4K = a/b => L = - a/b => bL = -a

प्र: In a pot, there is a mixture of milk and water in the ratio 4 : 5. If it is filled with an additional 8 litres of milk, the pot would be full and ratio of milk and water would become 6 : 5. Find the capacity of the pot ? 9636 0

प्र: Amar can do a piece of work in 10 days. He works at it for 4 days and then Arun finishes it in 9 days. In how many days can Amar and Arun together finish the work ? 5871 0

उत्तर : 4. "6 days"
व्याख्या :
Answer: D) 6 days Explanation: 4/10 + 9/x = 1 => x = 15 Then both can do in 1/10 + 1/15 = 1/6 => 6 days

प्र: The average age of a couple is 24 years when they were married five years ago but now the average age of the husband, wife and child is 20 years(the child was born during the interval). What is the present age of the child ? 2039 0

उत्तर : 1. "2 yrs"
व्याख्या :
Answer: A) 2 yrs Explanation: 29 x 2 = 5820 x 3 = 60 ----------- 2 years Therefore, the age of child is 2 years.

प्र: The cost price of an article is 54% of the marked price. Calculate the gain percent after allowing a discount of 15% ? 1642 0

उत्तर : 3. "48.4 %"
व्याख्या :
Answer: C) 48.4 % Explanation: Let marked price = Rs. 100. Then, C.P. = RS. 54, S.P. = Rs. 85Gain % = 31/64 x 100 = 48.4%.

प्र: A train 125 m long passes a man, running at 4 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is: 1669 0

प्र: At what rate percent on simple interest will Rs.415 amount to Rs.514 in 4 years ? 1429 0

उत्तर : 2. "5.96 %"
व्याख्या :
Answer: B) 5.96 % Explanation: Difference in amount = 514 - 415 = 99 99 = (415 x 4 x R)/100 R = 5.96%