Multiple choice questions on Mathematics for competitive examination Test 2
This is Test 2 on Mathematics consisting of 20 questions for self check of your preparedness for the competitive examination.
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This is a set of multiple choice questions on Mathematics for competitive examination
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Sr No Question Answer Remarks 1 What is the ratio of the highest and smallest number formed by 8,3,5,and 7? 2.44 Highest number: 8753 and smallest number 3578 and ratio will be 2.44. Pl remember there is no need to the calculation of division up to last decimal and guess the right number on finger tips to save time 2 Traffic light at three different crossing changes for NE movement every 48, 72 and 108 sec and found green aspect of all the three lights at 0700 hrs. At what time again the three lights will show green aspect together? 7 minutes 12 seconds Find the LCM of 48, 72 and 108 sec. Which will be 432 sec. and on dividing 432 sec by 60 sec we get 7 minutes 12 sec 3 Three boys step off together from the same spot. Their steps measure 63 cm, 70 cm and 77 cm respectively. What is the minimum distance each should cover so that all can cover the distance in complete steps? 6930 cm We have to find LCM of these three numbers which is 6930 4 Real numbers are set consisting rational and irrational numbers Read more on http://hotmath.com/hotmath_help/topics/numbersystems.html 5 There are 9 tiles of 1×1 m each is laid in a park with the condition that each one should touch at least one tile so as to obtain maximum perimeter. What is the perimeter in cm.? 36 The maximum perimeter will be obtained when none of the sides touches but only the edges and therefore 36 cm. 6 Zinc and Copper are melted together in the ratio of 9 and 11. During the process 30.6 Kg if Zinc was consumed. What is the weight of the alloy so produced? 68 Kg Let is the HCF in the ratio, than 9x=30.6 or x=3.4, and consumption of copper will be 11*3.4 or 37.4. Thus the total weight will be 68 Kg 7 Which of the following shows the maximum rise of temperature? ()10⁰ to 1⁰ The maximum change in temperature is 11 degree 8 Raju’s father age is 5 years more than 3 times the age of Raju. If father’s age is 44 years, what is the age of Raju? 13 3x+5=44 or x=13 9 Median is the line connecting vertex with the center of the opposite side 10 The population of a city decreased from 25000 to 24500. What is the percentage decrease? 20 500*100/25000 or 20% 11 The present age of Savitri is three times the age of his mother. After 5 years the sum of the age of Ram and Savitri is 66. What is the present age of Ram? 14 Let age of Ram is x, than savitri age today is 3x. After five years, Ram’s age will be (x+5) and Savitri is (3x+5) and total will be (4x+10)=66 or x=14 years. 12 A sum of all the interior angles of a polygon having n number of sides is given by the formula 180⁰(n1) 180(n2) where n is the number of sides 13 The students of Class VIII of a school donated Rs 2401 in all, for Prime Minister’s
National Relief Fund. Each student donated as many rupees as the number of students in the class. Find the number of students in the class.49 The number of students are x than x2=2401 or 7*7*7*7 or 49 students 14 A farmer had fodder for 20 cattle for 12 days. After 4 days, another 20 cattle will arrive. How long the fodder will last? undefined The fodder available is for 240 cattle days. 20 cattle will consume 20*4 cattle days in 4 days and it will be left 160 cattle days. Now with another 20 cattle added, it will last 160/(20+20) i.e. 4 days 15 A tap can fill a tank in 6 hours. After half the tank is filled then 3 more similar taps are opened. What will be the total time taken to fill the tank completely. 3hrs45m Half of the tank will be filled in 3 hours. After filling half of the tank, the filling capacity becomes 4/6 means it will take 3/2 hours to fill the full tank and 3/4 hours for the half tank. Total time taken is 3 hrs. 45 minutes 16 In how many approximate years, an amount invested at 8% will double? 9 years Do you know the rule of 72 for doubling the amount. Rate of interest*No. of years=72. Therefore if the interest rate is 8% it will double in 9 years. 17 Find the value of (2⁰)⁷+(3⁰)⁵ 1 Power of any number if zero, than its value will always be one 18 The distance between Earth and Sun is 1.496*10^8 Km and of earth and moon is 3.84*10^8 m. What is the distance between moon and sun during solar eclipse? The distance between Earth and Sun is 1.496*10^8 Km and of earth and moon is 3.84*10^8 m. What is the distance between moon and sun during solar eclipse? The distance of the moon is given in meter and to be converted to Km as 3.84*10^6 Km and distance between moon and sun will be 1.496*10^83.84*10^6 i.e. [149.63.84]*10^6=145.76*10^6 19 Find the value of p if (6p²3p63)=0 p=7/2,(3) The factors are 3(2p²p21) or 3(2p7)(p+3) or p=7/2, 3 20 With radius and height of a sphere and cylinder being same, what is the ratio of the sphere and cylinder volume? Wed Jan 01 2003 00:00:00 GMT+0530 (IST) volume of Sphere is 4/3πr^3 and of cylinder will be πr^3 and will be 4/3 
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Question 1 of 20
1. Question
What is the ratio of the highest and smallest number formed by 8,3,5,and 7?

Question 2 of 20
2. Question
Traffic light at three different crossing changes for NE movement every 48, 72 and 108 sec and found green aspect of all the three lights at 0700 hrs. At what time again the three lights will show green aspect together?

Question 3 of 20
3. Question
Three boys step off together from the same spot. Their steps measure 63 cm, 70 cm and 77 cm respectively. What is the minimum distance each should cover so that all can cover the distance in complete steps?

Question 4 of 20
4. Question
Real numbers are

Question 5 of 20
5. Question
There are 9 tiles of 1×1 m each is laid in a park with the condition that each one should touch at least one tile so as to obtain maximum perimeter. What is the perimeter in cm.?

Question 6 of 20
6. Question
Zinc and Copper are melted together in the ratio of 9 and 11. During the process 30.6 Kg if Zinc was consumed. What is the weight of the alloy so produced?

Question 7 of 20
7. Question
Which of the following shows the maximum rise of temperature?

Question 8 of 20
8. Question
Raju’s father age is 5 years more than 3 times the age of Raju. If father’s age is 44 years, what is the age of Raju?

Question 9 of 20
9. Question
Median of a triangle is

Question 10 of 20
10. Question
The population of a city decreased from 25000 to 24500. What is the percentage decrease?

Question 11 of 20
11. Question
The present age of Savitri is three times the age of his mother. After 5 years the sum of the age of Ram and Savitri is 66. What is the present age of Ram?

Question 12 of 20
12. Question
A sum of all the interior angles of a polygon having n number of sides is given by the formula

Question 13 of 20
13. Question
The students of Class VIII of a school donated Rs 2401 in all, for Prime Minister’s
National Relief Fund. Each student donated as many rupees as the number of students in the class. Find the number of students in the class. 
Question 14 of 20
14. Question
A farmer had fodder for 20 cattle for 12 days. After 4 days, another 20 cattle will arrive. How long the fodder will last?

Question 15 of 20
15. Question
A tap can fill a tank in 6 hours. After half the tank is filled then 3 more similar taps are opened. What will be the total time taken to fill the tank completely.

Question 16 of 20
16. Question
In how many approximate years, an amount invested at 8% will double?

Question 17 of 20
17. Question
Find the value of (2⁰)⁷+(3⁰)⁵

Question 18 of 20
18. Question
The distance between Earth and Sun is 1.496*10^8 Km and of earth and moon is 3.84*10^8 m. What is the distance between moon and sun during solar eclipse?

Question 19 of 20
19. Question
Find the value of p if (6p²3p63)=0

Question 20 of 20
20. Question
With radius and height of a sphere and cylinder being same, what is the ratio of the sphere and cylinder volume?
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