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PRESS START FOR RRB NTPC HCF & LCM MATHS SECTION FREE TEST
1.
Find the LCM of 25/7,15/28,20/21.
2.
The LCM of two number is 210. If their HCF is 35 and one of the number is 105, find the other number.
3.
Find the LCM of 15, 25 and 29.
4.
The ratio of two number is 4 : 3 and their HCF is 8. Find their LCM.
5.
HCF of two numbers is 19 and their LCM is 665. If one of the numbers is 95, find the other.
6.
If the Product of two numbers is 3192 and LCM is 56 then their HCF is:
7.
Find the LCM of 12, 16, 20 and 24.
8.
At a telephone exchange, three phone rings at intervals of 20 sec, 24 sec and 30 seconds. If they ring together at 11:25 a.m. when will they next ring together?
9.
Find the HCF of 48, 92 and 140.
10.
The HCF of two number is 21 and their LCM is 1386 if one of the numbers is 154. Find the other number.
11.
The HCF of two number is 13 and their LCM is 540 if one of the numbers is 78. Find the other number.
12.
Find the LCM of 0.63, 10.5, 2.1, 4.20
13.
Two number are in ratio 2 : 3 and their HCF is 16. Their LCM is:
14.
LCM of two number is 40 times their HCF. The sum of LCM and HCF is 410. If one number is 80, then what is the other number.
15.
The HCF of two number is 45 and their LCM is 900. If one the number 180, the other is:
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