Maths MCQs & Aptitude MCQs with Answers – Page 60

Question 1181 Problems on H.C.F and L.C.M

The H.C.F. of two numbers is 11 and their L.C.M. is 7700. If one of the numbers is 275, then the other is:

Correct answer C. 308

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Question 1182 Problems on H.C.F and L.C.M

A, B and C start at the same time in the same direction to run around a circular stadium. A completes a round in 252 seconds, B in 308 seconds and c in 198 seconds, all starting at the same point. After what time will they again at the starting point?

Correct answer D. 46 minutes and 12 seconds

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Question 1183 Problems on H.C.F and L.C.M

The least number which when divided by 5, 6, 7 and 8 leaves a remainder 3, but when divided by 9 leaves no remainder, is:

Correct answer B. 1683

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Question 1184 Problems on H.C.F and L.C.M

Reduce 128352/238368 to its lowest terms.

Correct answer C. 7/13

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Question 1185 Problems on H.C.F and L.C.M

The least number which should be added to 2497 so that the sum is exactly divisible by 5, 6, 4 and 3 is:

Correct answer C. 23

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Question 1186 Problems on H.C.F and L.C.M

Find the lowest common multiple of 24, 36 and 40.

Correct answer C. 360

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Question 1187 Problems on H.C.F and L.C.M

The least multiple of 7, which leaves a remainder of 4, when divided by 6, 9, 15 and 18 is:

Correct answer D. 364

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Question 1188 Problems on H.C.F and L.C.M

The product of two numbers is 2028 and their H.C.F. is 13. The number of such pairs is:

Correct answer B. 2

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Question 1189 Problems on H.C.F and L.C.M

The G.C.D. of 1.08, 0.36 and 0.9 is:

Correct answer C. 0.18

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Question 1190 Problems on H.C.F and L.C.M

Three number are in the ratio of 3: 4: 5 and their L.C.M. is 2400. Their H.C.F. is:

Correct answer A. 40

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Question 1191 Problems on H.C.F and L.C.M

The product of two numbers is 4107. If the H.C.F. of these numbers is 37, then the greater number is:

Correct answer C. 111

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Question 1192 Problems on H.C.F and L.C.M

The greatest number of four digits which is divisible by 15, 25, 40 and 75 is:

Correct answer C. 9600

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Question 1193 Problems on H.C.F and L.C.M

Let N be the greatest number that will divide 1305, 4665 and 6905, leaving the same remainder in each case. Then sum of the digits in N is:

Correct answer A. 4

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Question 1194 Problems on H.C.F and L.C.M

Six bells commence tolling together and toll at intervals of 2, 4, 6, 8 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together?

Correct answer D. 16

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Question 1195 Problems on H.C.F and L.C.M

The H.C.F. of two numbers is 23 and the other two factors of their L.C.M. are 13 and 14. The larger of the two numbers is:

Correct answer C. 322

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Question 1196 Problems on H.C.F and L.C.M

Find the greatest number that will divide 43, 91 and 183 so as to leave the same remainder in each case.

Correct answer A. 4

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Question 1197 Pipes and Cistern

If both the pipes are opened, how many hours will be taken to fill the tank? I. The capacity of the tank is 400 litres. II. The pipe A fills the tank in 4 hours. III. The pipe B fills the tank in 6 hours.

Correct answer B. Only II and III

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Question 1198 Pipes and Cistern

How long will it take to empty the tank if both the inlet pipe A and the outlet pipe B are opened simultaneously? I. A can fill the tank in 16 minutes. II. B can empty the full tank in 8 minutes.

Correct answer B. II alone sufficient while I alone not sufficient to answer

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Question 1199 Pipes and Cistern

How much time will the leak take to empty the full cistern? I. The cistern is normally filled in 9 hours. II. It takes one hour more than the usual time to fill the cistern because of la leak in the bottom.

Correct answer B. II alone sufficient while I alone not sufficient to answer

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Question 1200 Pipes and Cistern

Three pipes A, B and C can fill a tank in 6 hours. After working at it together for 2 hours, C is closed and A and B can fill the remaining part in 7 hours. The number of hours taken by C alone to fill the tank is:

Correct answer C. 14

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