Aptitude

Aptitude Questions and Answers

1

Find the H.C.F, if the numbers are in the ratio of 4 : 5 : 6 and their L.C.M. is 2400.

a

35

b

20

c

40

d

67

correct answer b

Let the numbers be 3x, 4x and 5x.

Then,their L.C.M. = 120x.

So, 120x = 2400 or x = 20.

=>The numbers are (4 x 20), (5 x 20) and (6 x 20).

Hence, required H.C.F = 20.

2

The greatest number which on dividing 1657 and 2037 leaves remainders 6 and 5 respectively, is:

a

123

b

127

c

235

d

305

correct answer b

Required number = H.C.F. of (1657 - 6) and (2037 - 5)

= H.C.F. of 1651 and 2032 = 127.

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