A train takes 62 seconds to cross a bridge of length 121 m. If the same train takes 51 seconds to cross a man standing on the bridge, find the length of the train.(In m) एक रेलगाड़ी 121 मीटर लंबे पुल को पार करने में 62 सेकंड का समय लेती है। यदि वही रेलगाड़ी पुल […]
Find the sum of the G.P.: 2/5, 2/25, 2/125, 2/625, … to the n terms. a) 5/4(1-(1/5n))b) 2/5(1-(1/5n))c) 1/2(1-(1/5n))d) 4/5(1-(1/5n)) Answer : c) 1/2(1-(1/5n)) UP Police SI Paper – Numerical Mental Ability Solution : To find the sum of the given geometric progression (G.P.), we need to identify the first term and the common ratio.The
Find the sum of the G.P.: 2/5, 2/25, 2/125, 2/625, … to the n terms. Read More »
The ratio between the number of males and females in a college is 21:22. If the number of males are increased by 20% and the number of female increased by 30%. What is new ratio of males and females in the college? a) 127:143b) 125:143c) 128:143d) 126:143 Ans : d) 126:143 UP Police SI Exam
A number divided by 11 leaves a remainder 3. What is the remainder when the square of the same number is divided by 11? a) 7b) 5c) 9d) 11 Ans : c) 9 UP Police SI Exam Paper – Mathematics Solution : Let the number be N. We are given that when N is divided
A person cycles from hostel to college at a speed of 20 kmph and reaches 13.5 minutes late. If he cycles at a speed of 24 kmph and reaches early by 13.5 minutes, find the distance between hostel and college. (In km) एक व्यक्ति हॉस्टल से कॉलेज तक 20 किमी प्रति घंटे की गति से
A boat goes 140 km upstream in 28 hours and a distance of 203 km downstream in 29 hours. Find the speed of the boat in still water. (In kmph) एक नाव धारा की विपरीत दिशा में 140 किमी की दूरी 28 घंटे में तय करती है और धारा की दिशा में 203 किमी की
Three numbers are in the ratio 11:13:15. If the difference between thrice the third number and the sum of first and second number is 441. Find the difference between the smallest and largest number? तीन संख्याएँ 11:13:15 के अनुपात में हैं। यदि तीसरी संख्या के तीन गुना और पहली और दूसरी संख्या के योगफल के
A man buys 15 mangoes for a rupee. How many mangoes had he sold for a rupee so that there is a loss of 25 percent? a) 20b) 17c) 28d) 38 Answer : a) 20 SSC Constable GD Exam – Elementary Mathematics Solution We need to find the selling price that results in a 25% loss. So,
A person loses 15 percent on selling 50 shoes for Rs 85. What should be the selling price of 50 shoes to earn a profit of 35 percent? a) Rs 115b) Rs 135c) Rs 110d) Rs 120 Ans : 135 SSC Constable GD Exam Paper : Quantitative Aptitude Solution Find the cost price of 50
Select the set in which the numbers are related in the same way as are the numbers of the following set.(34, 17, 27)(42, 21, 31) (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding/deleting/multiplying etc. to 13