Mathematics MCQs

Page No. 11

What will be the least number which when doubled will be exactly divisible by 12, 18, 21 and 30?


a196


b630


c1260


d2520


View Answer 630

The smallest fraction, which each of 6/7, 5/14, 10/21 will divide exactly is_________?


a30/7


b30/98


c60/147


d50/294


View Answer 30/7

The least number of four digits which is divisible by 15, 25, 40 and 75 is_________?


a9000


b9400


c9600


d9800


View Answer 9600

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


a3


b13


c23


d33


View Answer 23

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 meet again at the starting point?


a26 min 18 sec


b42 min 36 sec


c45 min


d46 min 12 sec


View Answer 46 min 12 sec

The greatest number which on dividing 1657 and 2037 leaves remainders 6 and 5 respectively, is_________?


a123


b127


c235


d305


View Answer 127

Which of the following has the most number of divisors?


a99


b101


c176


d182


View Answer 176

The L.C.M. of two numbers is 48. The numbers are in the ratio 2 : 3. Then sum of the number is_________?


a28


b32


c40


d64


View Answer 40

Greatest Common Divisor of two numbers is 8 while their Least Common Multiple is 144. Find the other number if one number is 16.


a108


b96


c72


d36


View Answer 72

LCM of two numbers is 138. But their (Greatest common divisor) GCD is 23. The numbers are in a ratio 1:6. Which is the largest number amongst the two?


a46


b138


c69


d23


View Answer 138

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