In which of the following expressions, prime factorisation has been done? (a) 24 = 2 3 4 (b) 56 = 7 2 2 2 (c) 70 = 2 5 7 (d) 54 = 2 3 9

In which of the following expressions, prime factorization has been done? 24\ x\ 2\ x\ 3\ x\ 4 56\ x\ 1\ x\ 7\ x\ 2\ x\ 2\ x\ 2 70=2\ x\ 5\ x\ 7\ (iv) 54=2\ x\ 3\ x\ 9

Solve the following expression : 7/3 + 9/2

Solve the following expression : 7/3 - 9/2

The exponent of 2 in the prime factorisation of 144, is (a) 4 (b) 5 (c) 6 (d) 3

Which of the following fractions is the smallest? 1/2,3/7,3/5,4/9 4/9 (b) 3/5 (c) 3/7 (d) 1/2

Which of the following equations will become correct? (a) 3+5−4×2=−1 (b) 1+9+3+5=9 (c) 6+5×2−3=7 (d) 3+4−1×5=2

Express the following mixed fractions as improper fractions (a) (2)(3)/(4) (b) (7)(1)/(9)(c)(5)(3)/(7)

In the following number series how many such 2's are there which are immediately preceded by a pair of numbers whose product is more than the product of pair of numbers immediately following 2 ? 7 7 2 1 3 9 4 2 6 5 2 4 8 3 5 2 7 6 5 2 9 2 8 6 4 3 9 2 4 6 5 7 1) 1 2) 2 3) 3 4) 4 5) None of these

Express the following expressions in its lowest terms. ((2)/(3)xx (-5)/(7)) -((2)/(3) xx (4)/(5))