Q21. Two numbers, both greater than 29, have H.C.F. 29 and L.C.M. 4147. The sum of the numbers is :
A. 669
B. 966
C. 696
D. 666
Q22. Reduce to its lowest terms.
A. 9/13
B. 3/4
C. 5/13
D. 7/13
Q23. The ratio of two numbers is 3 : 4 and their H.C.F. is 4. Their L.C.M. is :
A. 48
B. 24
C. 12
D. 16
Q24. Three numbers are in the ratio of 3 : 4 : 5 and their L.C.M. is 2400. Their H.C.F. is :
A. 200
B. 120
C. 40
D. 80
Q25. Find the highest common factor of 36 and 84.
A. 6
B. 4
C. 18
D. 12
Q26. The G.C.D. of 1.08, 0.36 and 0.9 is :
A. 0.18
B. 0.03
C. 0.108
D. 0.9
Q27. L.C.M. of two prime numbers x and y (x > y) is 161. The value of 3y – x is :
A. 1
B. 2
C. – 2
D. -1
Q28. H.C.F of ,
&
is:
A. 180
B. 360
C. 540
D. 1260
Q29. The maximum number of students among them 1001 pens and 910 pencils can be distributed in such a way that each student gets the same number of pens and same number of pencils is :
A. 91
B. 910
C. 1001
D. 1911
Q30. when expressed in simplest form is :
A. 17/26
B. 15/16
C. 25/26
D. 13/16