A train traveling at 136 km/h completely crosses another train having half its length and traveling in the opposite direction at 44 km/h in 6 s. If it also passes a railway platform in 45 s, then find the length of the platform. (In m) 136 km/h की गति से चलने वाली एक ट्रेन, इससे […]
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
On selling a watch at 3/10 of the marked price there is a loss of 16 percent. What will be the ratio of the marked price and the cost price of the watch? a) 19 : 8b) 8 : 5c) 14 : 5 d) 7 : 4 Ans : c) 14 : 5 SSC Constable
If the average marks of three classes of 55, 60 and 65 students are 55,60, 65 respectively, find the average marks of all the students. (In approximately) यदि 55, 60 और 65 छात्रों वाली तीन कक्षाओं के औसत अंक क्रमशः 55,60, 65 हैं, तो सभी छात्रों के औसत अंक ज्ञात कीजिए। (लगभग) a) 62.277b) 66.277c)
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,
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