Q1. In an accurate clock, in a period of 2 h 20 min (140 min), the minute hand will move over(1996)
(a) 520°
(b) 320°
(c) 840°
(d) 140
Ans. (c)
Exp. The angle which minute hand move over in 60 min = 360° 360° =6° So, angle made by minute hand in minute 60 So, in a period of 2 h 20 min (2×60+20=) 140 min the minute hand will move over = 6 x 140°=840°
Q2. In an office, the number of persons who take tea is twice the number of persons who take only coffee. The number of persons who take coffee is twice the number of persons who take only tea.
Consider the following statement(2006)
1.The sum of the number of persons who take either tea or coffee or both is four times the number of persons who take both coffee and tea.
2.The sum of the number of persons who take only coffee and those who take only tea is twice the number of persons who take both tea and coffee.
Which of the statement(s) given above is/are correct?
(a) Only 1
(c) Only 2
(b) Both 1 and 2
(d) Neither 1 nor
Ans. (b)
Exp. Let the number of only tea takers be x, number of only coffee takers be y and number of both tea and coffee takers be z.
According to the question, x+z=2y (i) Valdiary+z=2xollol. (ii) From Eqs. (i) and (ii), x = y = z x+y+z=z+z+z=3z Thus, Statement 1 is not correct. Also, x + y = z+z=2z
Thus, Statement 2 is correct
Q3. A watch showed a time of fourteen minutes past nine (9 hrs and 14 min). The positions of the hour-hand and the minute hand of the watch are exactly interchanged. The new time shown by the watch is closest to which one of the following?
(2006)
(a) Twelve minutes to three
(b) Thirteen minutes to three
(c) Fourteen minutes to three (d) Fifteen minutes to three
Ans. (c)
Exp. Given, angle rotated by hour hand at time 9 : 1400 =9×30° +14 x 30° 60 = 270+7=277°
When hour and minute hand interchange their position, then time when minutes hand rotated by 277°= 277°/6= =46.16 min 46 min 6 so new time will be 14 min to go three according to the question
Q4. Consider the four age pyramids given below namely A, B, C and D representing four different countries.(2011)
Which one of them indicates the declining population? (2011)
(a) A
(b)) B
(c) C
(d) D
Ans. (c)
Exp. Declining population means greater number of death rate that is narrower upper part and lower number of birth rate that is narrower base.
These conditions are satisfied by C.
Q5. Consider the following figure and answer the question that follows(2011)
In the figure shown above, OP, and OP2 are two plane mirrors kept perpendicular to each other, Sis the direction of a beam of light falling on the mirror OP. The direction of the reflected beam of light from the mirror OP2 will be
(a) perpendicular to the direction S
(b) at 45° to the direction S
(c) opposite and parallel to the direction S
(d) at 60° to the direction S
Ans. (c
Exp. The reflected ray from mirror OP, will be parallel but opposite to the direction of S.
Q6. Four friends, A, B, C and D distribute some money among themselves in such a manner that A gets one less than B, C gets 5 more than D, D gets 3 more than B. Who gets the smallest amount? (2013)
(a) A
(b) B
(c) C
(d) D
Ans. (a)
Exp. Let the amount of money with A bea, B beb, C bec and with D bed.
Given that a=b-1, c-d+5, d= b +3. Now, c = d + 5 = b + 8. Hence, only A gets less than b and no one else gets less than b. Which means that A gets the smallest amount.: ball-moon emo
Q7. Four persons, Alok, Bhupesh, Chander and Dinesh have a total of 100 among themselves. Alok and Bhupesh between them have as much money as Chander and Dinesh between them but Alok has more money than Bhupesh, and Chander has only half the money that Dinesh has. Alok has in fact 5 more than Dinesh has. Who has the maximum amount of money?(2004)
(a) Alok
(b) Bhupesh
(c) Chander
(d) Dinesh
Ans.(a)
Exp. 4 persons, i.e. Alok, Bhupesh, Chander and Dinesh have
₹100.
Now, Alok and Bhupesh between them have as much money as Chander and Dinesh. and Alok + Bhupesh = 50 Chander + Dinesh = 50 Now, Alok has more money than Bhupesh Alok > Bhupesh and Chander has only half the money that Dinesh has Dinesh Chander It is given Alok has 5 more than Dinesh Alok > Dinesh From Eq. (i), (ii) and (iii), we have following order Alok > Dinesh > Chander or Bhupesh So, Alok has maximum amount of money.
Q8. Twelve people form a club. By picking lots, one of them will host a dinner for all once in a month. The number of dinners a particular member has to host in 1 yr is
(2015
(a) one (b) zero (c) three (d) cannot be predicted
Since in picking lots a single host can be repeated multiple times. So, we cannot predicted the number of dinners that a particular member has to host in 1 yr.
Q9. Each of A, B, C and D has 100. A pays 20 to B, who pays 10 to C, who gets 30 from D. In this context, which one of the following statements is not correct? (2015)
(a) C is the richest
(b) D is the poorest
(c) C has more than what A and D have together (d) B is richer than
Ans. (c)
Exp. According to the given information, each of A, B, C and D has 100.
So, A’s amount = 100-20 = 80
B’s amount=100+20-10 = 110
C’s amount=100+10+30=140
D’s amount=100-30 = 70
From the above, it is clear that statement of option (c) is not correct.
Q10. There are some nectar-filled flowers on a tree and some bees are hovering on it. If one bee land on each
flower, one bee will be left out. If two bees land oneach flower, one bee will be left out. If two bees land on each flower, one flower will be left out. The number of flowers and bees respectively are(2016)
(a) 2 and 4
(b) 3 and 2
(c) 3 and 4
(d) 4 and
Ans. (c)
Exp. Going through all the choices, If number of flowers = 3 and number of bees = 4 Then, the given conditions are satisfied
Q11. The monthly average salary paid to all the employees of a company was 5000. The monthly average salary paid to male and female employees was 5200 and 4200, respectively. Then, the percentage of males employed in the company is (2016)
(a) 75%
(b) 80%
(c) 85%
(d) 90%
Ans. (b)
EXP. Let the number of male and female employees be x and y, respectively. salary = 5000
Given, monthly average Monthly average salary of male employees = 5200 Monthly average salary of female employees = 4200 According to question 5000(X+Y)=5200X+4200Y 5000X+5000Y=5200X 4200Y 200X=800Y, X=4Y Required percenrtage =X/X+Y*100%=X+X/4*100%=4X/5X*100%=80%
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