Loading DocumentQ.1 Multiple choice Questions: (5)
(i) The sum of 3ab,−2ab and 8ab is
(a)9ab (b) 9a2b2 (c)13ab (d)7ab
(ii) The product of 3a3and 5a7is
(a)15a4(b)15a10 (c)15a7 (c)15a3
(iii)If x=3 and y=2, then the value of(x−y)(x2+xy+y2) is\\
(a) 31 (b) 19 (c) 1 (c) 25
(iv) The value of 20.4 ×19.6 is
(a) 399.86 (b) 399.84 (c) 398.6 (d) 398.4
(v) The square root of 841 is
(a) 19 (b) 21 (c) 31 (d) 29
Q.2 Find the square root of 25581 . (2)
Q.3 Find the square of the 35 using the column method. (3)
Q.4 Find the Square root of 6561 using prime factorisation. (3)
Q.5Find the number of digits in the Square root of the following: (3)
(i) 49
(ii) 144
(iii) 15129
Q.6 Divide 5x3−15x2+25x by 5x. (2)
Q.7 Factorise the x2+6xy+9y2. (2)