21. The greatest possible length which can be used to measure exactly the lengths 7 m, 3 m 85 cm, 12 m 95 cm is:
22. Three numbers which are co-prime to each other are such that the product of the first two is 551 and that of the last two is 1073. The sum of the three numbers is:
23. Find the highest common factor of 36 and 84
24. Which of the following fraction is the largest ?
25. The least number, which when divided by 12, 15, 20 and 54 leaves in each case a remainder of 8 is:
26. The greatest number which on dividing 1657 and 2037 leaves remainders 6 and 5 respectively, is:
27. Which of the following has the most number of divisors?
28. The L.C.M. of two numbers is 48. The numbers are in the ratio 2 : 3. Then sum of the number is:
29. The H.C.F. of $$\frac{{9}}{{10}},$$ $$\frac{{12}}{{25}},$$ $$\frac{{18}}{{35}}$$ and $$\frac{{21}}{{40}}$$ is:
30. If the sum of two numbers is 55 and the H.C.F. and L.C.M. of these numbers are 5 and 120 respectively, then the sum of the reciprocals of the numbers is equal to:
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