Core Mathematics Marks : 35 Time: 2 Hours 1. a. Find the 8th and 12th number of the following sequence: 1,3,6,10,.............. b. a square with the side 4 cm is cut into four equal squares . Whart is the area and perimeter of the small square? (c) Convert 256 into a babylonian numeral. 7300 3 (d) Rehnuma wants to buy a refrigerator which costs Rs 28000. She found a 25% discount on an online shopping site for the same refrigerator. How much would she pay if she buys the refrigerator from the online shopping site? (e) Multiply 625 and 749 using the lattice method. (f) Akshita scored 65 marks in each of the five subjects. Find and discuss the mean and median of her scores justify your answer. g) Make a sentence that includes cardinal and ordinal numbers Section-B 2. (a)A base 12 numeration svstem uses the following symbols : 0,1,2.3,4.5,6,7,8,9,A.B (i)What are the values of B5A and 59A in the decimal system? (ii) Write 1256 and 769 in this system (iii) How many three digit number