Day - 1 - Class - 3 Question 1 : Two numbers are in the ratio of 5:11. If their HCF is 7, find the numbers. Question 2 : Find the length of the plank which can be used to measure exactly the lengths 4 m 50 cm, 9 m 90 cm and 16 m 20 cm in the least time. Question 3 : Find the greatest number which on dividing 70 and 50 leaves remainders 1 and 4 respectively. Day - 2 - Class - 4 Question 4 : Find the largest number which divides 64, 136 and 238 to leave the same remainder in each case. Question 5 : Find the least number which when divided by 5,7,9 and 12, leaves the same remainder 3 in each case Question 6 : Find the largest four digit number exactly divisible by 15,21 and 28.